121020221112120 has 128 divisors (see below), whose sum is σ = 440073531360000. Its totient is φ = 29338235418240.

The previous prime is 121020221112067. The next prime is 121020221112149. The reversal of 121020221112120 is 21211122020121.

121020221112120 is a `hidden beast` number, since 1 + 210 + 2 + 0 + 221 + 112 + 120 = 666.

It is a super-2 number, since 2×121020221112120² (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 = 121020221112093 and 121020221112102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5093431770 + ... + 5093455529.

It is an arithmetic number, because the mean of its divisors is an integer number (3438074463750).

Almost surely, 2^{121020221112120} is an apocalyptic number.

121020221112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020221112120 is an abundant number, since it is smaller than the sum of its proper divisors (319053310247880).

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

121020221112120 is a wasteful number, since it uses less digits than its factorization.

121020221112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10186887330 (or 10186887320 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121020221112120 its reverse (21211122020121), we get a palindrome (142231343132241).

It can be divided in two parts, 1210202 and 21112120, that added together give a palindrome (22322322).

The spelling of 121020221112120 in words is "one hundred twenty-one trillion, twenty billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty".