21132001023 has 24 divisors (see below), whose sum is σ = 32799146112. Its totient is φ = 12066962544.

The previous prime is 21132000971. The next prime is 21132001049. The reversal of 21132001023 is 32010023112.

It is not a de Polignac number, because 21132001023 - 2⁶ = 21132000959 is a prime.

It is a super-2 number, since 2×21132001023² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21132000993 and 21132001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132001063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163036 + ... + 262382.

It is an arithmetic number, because the mean of its divisors is an integer number (1366631088).

Almost surely, 2^21132001023 is an apocalyptic number.

21132001023 is a deficient number, since it is larger than the sum of its proper divisors (11667145089).

21132001023 is a wasteful number, since it uses less digits than its factorization.

21132001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100811 (or 100804 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21132001023 its reverse (32010023112), we get a palindrome (53142024135).

The spelling of 21132001023 in words is "twenty-one billion, one hundred thirty-two million, one thousand, twenty-three".