121021211120112 has 120 divisors (see below), whose sum is σ = 343800378202320. Its totient is φ = 39732068090880.

The previous prime is 121021211120057. The next prime is 121021211120129. The reversal of 121021211120112 is 211021112120121.

It is a happy number.

121021211120112 is a `hidden beast` number, since 1 + 210 + 212 + 11 + 120 + 112 = 666.

It is a super-2 number, since 2×121021211120112² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60659412 + ... + 62622732.

It is an arithmetic number, because the mean of its divisors is an integer number (2865003151686).

Almost surely, 2^{121021211120112} is an apocalyptic number.

121021211120112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121021211120112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171900189101160).

121021211120112 is an abundant number, since it is smaller than the sum of its proper divisors (222779167082208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121021211120112 is a wasteful number, since it uses less digits than its factorization.

121021211120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969791 (or 1969782 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121021211120112 its reverse (211021112120121), we get a palindrome (332042323240233).

The spelling of 121021211120112 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred twelve".