21223713884258 has 4 divisors (see below), whose sum is σ = 31835570826390. Its totient is φ = 10611856942128.

The previous prime is 21223713884239. The next prime is 21223713884327. The reversal of 21223713884258 is 85248831732212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19298826799849 + 1924887084409 = 4393043^2 + 1387403^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305928471063 + ... + 5305928471066.

Almost surely, 2^{21223713884258} is an apocalyptic number.

21223713884258 is a deficient number, since it is larger than the sum of its proper divisors (10611856942132).

21223713884258 is a wasteful number, since it uses less digits than its factorization.

21223713884258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611856942131.

The product of its digits is 10321920, while the sum is 56.

The spelling of 21223713884258 in words is "twenty-one trillion, two hundred twenty-three billion, seven hundred thirteen million, eight hundred eighty-four thousand, two hundred fifty-eight".