21000023021132 has 6 divisors (see below), whose sum is σ = 36750040286988. Its totient is φ = 10500011510564.

The previous prime is 21000023021123. The next prime is 21000023021149. The reversal of 21000023021132 is 23112032000012.

It is a super-2 number, since 2×21000023021132² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21000023021132.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625002877638 + ... + 2625002877645.

It is an arithmetic number, because the mean of its divisors is an integer number (6125006714498).

Almost surely, 2^{21000023021132} is an apocalyptic number.

It is an amenable number.

21000023021132 is a deficient number, since it is larger than the sum of its proper divisors (15750017265856).

21000023021132 is a wasteful number, since it uses less digits than its factorization.

21000023021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250005755287 (or 5250005755285 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000023021132 its reverse (23112032000012), we get a palindrome (44112055021144).

The spelling of 21000023021132 in words is "twenty-one trillion, twenty-three million, twenty-one thousand, one hundred thirty-two".