261421062216120 has 128 divisors (see below), whose sum is σ = 871773257966400. Its totient is φ = 69682705878528.

The previous prime is 261421062216107. The next prime is 261421062216179. The reversal of 261421062216120 is 21612260124162.

261421062216120 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 2 + 1 + 0 + 622 + 1 + 6 + 1 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48802879 + ... + 53893998.

Almost surely, 2^{261421062216120} is an apocalyptic number.

261421062216120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261421062216120 is an abundant number, since it is smaller than the sum of its proper divisors (610352195750280).

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

261421062216120 is a wasteful number, since it uses less digits than its factorization.

261421062216120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102699254 (or 102699244 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 261421062216120 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, sixty-two million, two hundred sixteen thousand, one hundred twenty".