121120112111220 has 72 divisors (see below), whose sum is σ = 367401055740264. Its totient is φ = 32298399214848.

The previous prime is 121120112111107. The next prime is 121120112111231. The reversal of 121120112111220 is 22111211021121.

It is a happy number.

121120112111220 is a `hidden beast` number, since 1 + 211 + 20 + 1 + 1 + 211 + 1 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2555975982564 + 118564136128656 = 1598742^2 + 10888716^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 121120112111193 and 121120112111202.

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, 16865382 + ... + 22949538.

It is an arithmetic number, because the mean of its divisors is an integer number (5102792440837).

Almost surely, 2^{121120112111220} is an apocalyptic number.

121120112111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120112111220 is an abundant number, since it is smaller than the sum of its proper divisors (246280943629044).

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

121120112111220 is a wasteful number, since it uses less digits than its factorization.

121120112111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194769 (or 6194764 counting only the distinct ones).

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

Adding to 121120112111220 its reverse (22111211021121), we get a palindrome (143231323132341).

The spelling of 121120112111220 in words is "one hundred twenty-one trillion, one hundred twenty billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty".