21261411246051 has 48 divisors (see below), whose sum is σ = 32374353473280. Its totient is φ = 13408719048000.

The previous prime is 21261411245989. The next prime is 21261411246109. The reversal of 21261411246051 is 15064211416212.

21261411246051 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 1 + 41 + 1 + 2 + 4 + 605 + 1 = 666.

It is not a de Polignac number, because 21261411246051 - 2¹⁰ = 21261411245027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21261411245997 and 21261411246015.

It is not an unprimeable number, because it can be changed into a prime (21261411247051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 683829016 + ... + 683860106.

It is an arithmetic number, because the mean of its divisors is an integer number (674465697360).

Almost surely, 2^{21261411246051} is an apocalyptic number.

21261411246051 is a deficient number, since it is larger than the sum of its proper divisors (11112942227229).

21261411246051 is a wasteful number, since it uses less digits than its factorization.

21261411246051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36808 (or 36805 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 21261411246051 in words is "twenty-one trillion, two hundred sixty-one billion, four hundred eleven million, two hundred forty-six thousand, fifty-one".