121202102002120 has 64 divisors (see below), whose sum is σ = 279611655024240. Its totient is φ = 47255106662400.

The previous prime is 121202102002099. The next prime is 121202102002139. The reversal of 121202102002120 is 21200201202121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 34333998068484 + 86868103933636 = 5859522^2 + 9320306^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121202102002094 and 121202102002103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32015221 + ... + 35600260.

Almost surely, 2^{121202102002120} is an apocalyptic number.

121202102002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202102002120 is an abundant number, since it is smaller than the sum of its proper divisors (158409553022120).

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

121202102002120 is a wasteful number, since it uses less digits than its factorization.

121202102002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67616626 (or 67616622 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121202102002120 its reverse (21200201202121), we get a palindrome (142402303204241).

The spelling of 121202102002120 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred two million, two thousand, one hundred twenty".