121025315536 has 40 divisors (see below), whose sum is σ = 248426956800. Its totient is φ = 56919350784.

The previous prime is 121025315533. The next prime is 121025315549. The reversal of 121025315536 is 635513520121.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121025315533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331185 + ... + 593071.

It is an arithmetic number, because the mean of its divisors is an integer number (6210673920).

Almost surely, 2^121025315536 is an apocalyptic number.

121025315536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121025315536 is an abundant number, since it is smaller than the sum of its proper divisors (127401641264).

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

121025315536 is a wasteful number, since it uses less digits than its factorization.

121025315536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263611 (or 263605 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 121025315536 its reverse (635513520121), we get a palindrome (756538835657).

The spelling of 121025315536 in words is "one hundred twenty-one billion, twenty-five million, three hundred fifteen thousand, five hundred thirty-six".