121021112111220 has 144 divisors (see below), whose sum is σ = 387192678600000. Its totient is φ = 30512484158976.

The previous prime is 121021112111213. The next prime is 121021112111281. The reversal of 121021112111220 is 22111211120121.

It is a happy number.

121021112111220 is a `hidden beast` number, since 1 + 21 + 0 + 211 + 1 + 211 + 1 + 220 = 666.

It is a super-2 number, since 2×121021112111220² (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 junction number, because it is equal to n+sod(n) for n = 121021112111193 and 121021112111202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33750625 + ... + 37163784.

Almost surely, 2^{121021112111220} is an apocalyptic number.

121021112111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021112111220 is an abundant number, since it is smaller than the sum of its proper divisors (266171566488780).

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

121021112111220 is a wasteful number, since it uses less digits than its factorization.

121021112111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70914942 (or 70914937 counting only the distinct ones).

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

Adding to 121021112111220 its reverse (22111211120121), we get a palindrome (143132323231341).

The spelling of 121021112111220 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty".