121331202120 has 96 divisors (see below), whose sum is σ = 394382476800. Its totient is φ = 32350386816.

The previous prime is 121331202101. The next prime is 121331202169. The reversal of 121331202120 is 21202133121.

121331202120 is a `hidden beast` number, since 12 + 1 + 331 + 202 + 120 = 666.

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 = 121331202093 and 121331202102.

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, 3063001 + ... + 3102359.

It is an arithmetic number, because the mean of its divisors is an integer number (4108150800).

Almost surely, 2^121331202120 is an apocalyptic number.

121331202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121331202120 is an abundant number, since it is smaller than the sum of its proper divisors (273051274680).

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

121331202120 is a wasteful number, since it uses less digits than its factorization.

121331202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47939 (or 47932 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121331202120 its reverse (21202133121), we get a palindrome (142533335241).

The spelling of 121331202120 in words is "one hundred twenty-one billion, three hundred thirty-one million, two hundred two thousand, one hundred twenty".