121635234040 has 32 divisors (see below), whose sum is σ = 274906558080. Its totient is φ = 48435910272.

The previous prime is 121635234029. The next prime is 121635234131. The reversal of 121635234040 is 40432536121.

It is a junction number, because it is equal to n+sod(n) for n = 121635233993 and 121635234011.

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, 6809199 + ... + 6827038.

It is an arithmetic number, because the mean of its divisors is an integer number (8590829940).

Almost surely, 2^121635234040 is an apocalyptic number.

121635234040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121635234040 is an abundant number, since it is smaller than the sum of its proper divisors (153271324040).

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

121635234040 is a wasteful number, since it uses less digits than its factorization.

121635234040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13636471 (or 13636467 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 121635234040 in words is "one hundred twenty-one billion, six hundred thirty-five million, two hundred thirty-four thousand, forty".