21355466401051 has 2 divisors, whose sum is σ = 21355466401052. Its totient is φ = 21355466401050.

The previous prime is 21355466401039. The next prime is 21355466401081. The reversal of 21355466401051 is 15010466455312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21355466401051 - 2²³ = 21355458012443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21355466400989 and 21355466401007.

It is not a weakly prime, because it can be changed into another prime (21355466401021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677733200525 + 10677733200526.

It is an arithmetic number, because the mean of its divisors is an integer number (10677733200526).

Almost surely, 2^{21355466401051} is an apocalyptic number.

21355466401051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21355466401051 is an equidigital number, since it uses as much as digits as its factorization.

21355466401051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 21355466401051 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-six million, four hundred one thousand, fifty-one".