121475949156 has 225 divisors, whose sum is σ = 342520648239. Its totient is φ = 37541294208.

The previous prime is 121475949149. The next prime is 121475949163. The reversal of 121475949156 is 651949574121.

The square root of 121475949156 is 348534.

It is a perfect power (a square), and thus also a powerful number.

121475949156 is a `hidden beast` number, since 1 + 2 + 1 + 47 + 594 + 9 + 1 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (121475949149) and next prime (121475949163).

It can be written as a sum of positive squares in 2 ways, for example, as 37700435556 + 83775513600 = 194166^2 + 289440^2 .

It is a super-2 number, since 2×121475949156² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 1813073835 + ... + 1813073901.

Almost surely, 2^121475949156 is an apocalyptic number.

121475949156 is the 348534-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121475949156

121475949156 is an abundant number, since it is smaller than the sum of its proper divisors (221044699083).

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

121475949156 is an frugal number, since it uses more digits than its factorization.

121475949156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 89 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 121475949156 in words is "one hundred twenty-one billion, four hundred seventy-five million, nine hundred forty-nine thousand, one hundred fifty-six".