21263223405051 has 24 divisors (see below), whose sum is σ = 31740048098304. Its totient is φ = 13702742639280.

The previous prime is 21263223405031. The next prime is 21263223405071. The reversal of 21263223405051 is 15050432236212.

21263223405051 is a `hidden beast` number, since 2 + 1 + 26 + 3 + 223 + 405 + 0 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21263223405031) and next prime (21263223405071).

It is not a de Polignac number, because 21263223405051 - 2⁶ = 21263223404987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21263223404997 and 21263223405015.

It is not an unprimeable number, because it can be changed into a prime (21263223405031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42713221 + ... + 43208166.

It is an arithmetic number, because the mean of its divisors is an integer number (1322502004096).

Almost surely, 2^{21263223405051} is an apocalyptic number.

21263223405051 is a deficient number, since it is larger than the sum of its proper divisors (10476824693253).

21263223405051 is a wasteful number, since it uses less digits than its factorization.

21263223405051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85922311 (or 85922308 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 21263223405051 in words is "twenty-one trillion, two hundred sixty-three billion, two hundred twenty-three million, four hundred five thousand, fifty-one".