121132356420 has 48 divisors (see below), whose sum is σ = 357021685440. Its totient is φ = 30601858176.

The previous prime is 121132356409. The next prime is 121132356451. The reversal of 121132356420 is 24653231121.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 53127087 + ... + 53129366.

It is an arithmetic number, because the mean of its divisors is an integer number (7437951780).

Almost surely, 2^121132356420 is an apocalyptic number.

121132356420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121132356420 is an abundant number, since it is smaller than the sum of its proper divisors (235889329020).

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

121132356420 is a wasteful number, since it uses less digits than its factorization.

121132356420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106256484 (or 106256482 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 121132356420 its reverse (24653231121), we get a palindrome (145785587541).

The spelling of 121132356420 in words is "one hundred twenty-one billion, one hundred thirty-two million, three hundred fifty-six thousand, four hundred twenty".