21213611546051 has 2 divisors, whose sum is σ = 21213611546052. Its totient is φ = 21213611546050.

The previous prime is 21213611546041. The next prime is 21213611546059. The reversal of 21213611546051 is 15064511631212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21213611546051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213611545996 and 21213611546014.

It is not a weakly prime, because it can be changed into another prime (21213611546059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606805773025 + 10606805773026.

It is an arithmetic number, because the mean of its divisors is an integer number (10606805773026).

Almost surely, 2^{21213611546051} is an apocalyptic number.

21213611546051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213611546051 is an equidigital number, since it uses as much as digits as its factorization.

21213611546051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 21213611546051 in words is "twenty-one trillion, two hundred thirteen billion, six hundred eleven million, five hundred forty-six thousand, fifty-one".