21011452031223 has 6 divisors (see below), whose sum is σ = 30349875156224. Its totient is φ = 14007634687476.

The previous prime is 21011452031183. The next prime is 21011452031243. The reversal of 21011452031223 is 32213025411012.

It is a happy number.

21011452031223 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 14 + 520 + 3 + 122 + 3 = 666.

It is not a de Polignac number, because 21011452031223 - 2¹⁰ = 21011452030199 is a prime.

It is a super-2 number, since 2×21011452031223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011452031243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167302890615 + ... + 1167302890632.

Almost surely, 2^{21011452031223} is an apocalyptic number.

21011452031223 is a deficient number, since it is larger than the sum of its proper divisors (9338423125001).

21011452031223 is a wasteful number, since it uses less digits than its factorization.

21011452031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334605781253 (or 2334605781250 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21011452031223 its reverse (32213025411012), we get a palindrome (53224477442235).

The spelling of 21011452031223 in words is "twenty-one trillion, eleven billion, four hundred fifty-two million, thirty-one thousand, two hundred twenty-three".