121021200030120 has 128 divisors (see below), whose sum is σ = 390997851027840. Its totient is φ = 29789355248640.

The previous prime is 121021200030113. The next prime is 121021200030161. The reversal of 121021200030120 is 21030002120121.

It is a super-2 number, since 2×121021200030120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121021200030120.

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, 101912590 + ... + 103093250.

It is an arithmetic number, because the mean of its divisors is an integer number (3054670711155).

Almost surely, 2^{121021200030120} is an apocalyptic number.

121021200030120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021200030120 is an abundant number, since it is smaller than the sum of its proper divisors (269976650997720).

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

121021200030120 is a wasteful number, since it uses less digits than its factorization.

121021200030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246395 (or 1246391 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121021200030120 its reverse (21030002120121), we get a palindrome (142051202150241).

The spelling of 121021200030120 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred million, thirty thousand, one hundred twenty".