23001021000 has 96 divisors (see below), whose sum is σ = 77743481400. Its totient is φ = 6133603200.

The previous prime is 23001020971. The next prime is 23001021011. The reversal of 23001021000 is 12010032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3118328964 + 19882692036 = 55842^2 + 141006^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1268835 + ... + 1286834.

Almost surely, 2^23001021000 is an apocalyptic number.

23001021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23001021000 is an abundant number, since it is smaller than the sum of its proper divisors (54742460400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23001021000 is a wasteful number, since it uses less digits than its factorization.

23001021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555696 (or 2555679 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 23001021000 its reverse (12010032), we get a palindrome (23013031032).

The spelling of 23001021000 in words is "twenty-three billion, one million, twenty-one thousand".