121101010111020 has 192 divisors, whose sum is σ = 371435209891200. Its totient is φ = 29343854346240.

The previous prime is 121101010111009. The next prime is 121101010111033. The reversal of 121101010111020 is 20111010101121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121101010110987 and 121101010111005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 445368466 + ... + 445640294.

It is an arithmetic number, because the mean of its divisors is an integer number (1934558384850).

Almost surely, 2^{121101010111020} is an apocalyptic number.

121101010111020 is a gapful number since it is divisible by the number (10) 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 121101010111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185717604945600).

121101010111020 is an abundant number, since it is smaller than the sum of its proper divisors (250334199780180).

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

121101010111020 is a wasteful number, since it uses less digits than its factorization.

121101010111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286948 (or 286946 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121101010111020 its reverse (20111010101121), we get a palindrome (141212020212141).

The spelling of 121101010111020 in words is "one hundred twenty-one trillion, one hundred one billion, ten million, one hundred eleven thousand, twenty".