121634953500 has 48 divisors (see below), whose sum is σ = 354200988960. Its totient is φ = 32435987200.

The previous prime is 121634953481. The next prime is 121634953511. The reversal of 121634953500 is 5359436121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40543485 + ... + 40546484.

It is an arithmetic number, because the mean of its divisors is an integer number (7379187270).

Almost surely, 2^121634953500 is an apocalyptic number.

121634953500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121634953500 is an abundant number, since it is smaller than the sum of its proper divisors (232566035460).

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

121634953500 is a wasteful number, since it uses less digits than its factorization.

121634953500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81089991 (or 81089979 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 121634953500 in words is "one hundred twenty-one billion, six hundred thirty-four million, nine hundred fifty-three thousand, five hundred".