121202231420 has 24 divisors (see below), whose sum is σ = 258011328624. Its totient is φ = 47816770176.

The previous prime is 121202231417. The next prime is 121202231441. The reversal of 121202231420 is 24132202121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121202231392 and 121202231401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41506154 + ... + 41509073.

It is an arithmetic number, because the mean of its divisors is an integer number (10750472026).

Almost surely, 2^121202231420 is an apocalyptic number.

121202231420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202231420 is an abundant number, since it is smaller than the sum of its proper divisors (136809097204).

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

121202231420 is a wasteful number, since it uses less digits than its factorization.

121202231420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83015309 (or 83015307 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121202231420 its reverse (24132202121), we get a palindrome (145334433541).

The spelling of 121202231420 in words is "one hundred twenty-one billion, two hundred two million, two hundred thirty-one thousand, four hundred twenty".