121637133250 has 32 divisors (see below), whose sum is σ = 232001054064. Its totient is φ = 47736832000.

The previous prime is 121637133229. The next prime is 121637133257. The reversal of 121637133250 is 52331736121.

It can be written as a sum of positive squares in 8 ways, for example, as 24524499609 + 97112633641 = 156603^2 + 311629^2 .

It is not an unprimeable number, because it can be changed into a prime (121637133257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4576831 + ... + 4603330.

Almost surely, 2^121637133250 is an apocalyptic number.

121637133250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121637133250 is a deficient number, since it is larger than the sum of its proper divisors (110363920814).

121637133250 is an equidigital number, since it uses as much as digits as its factorization.

121637133250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9180231 (or 9180221 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

Adding to 121637133250 its reverse (52331736121), we get a palindrome (173968869371).

The spelling of 121637133250 in words is "one hundred twenty-one billion, six hundred thirty-seven million, one hundred thirty-three thousand, two hundred fifty".