121751552610 has 24 divisors (see below), whose sum is σ = 316554037020. Its totient is φ = 32467080672.

The previous prime is 121751552603. The next prime is 121751552621. The reversal of 121751552610 is 16255157121.

121751552610 is a `hidden beast` number, since 1 + 21 + 7 + 5 + 15 + 5 + 2 + 610 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 111254935401 + 10496617209 = 333549^2 + 102453^2 .

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 676397425 + ... + 676397604.

Almost surely, 2^121751552610 is an apocalyptic number.

121751552610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121751552610 is an abundant number, since it is smaller than the sum of its proper divisors (194802484410).

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

121751552610 is a wasteful number, since it uses less digits than its factorization.

121751552610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352795042 (or 1352795039 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 121751552610 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred fifty-two thousand, six hundred ten".