10021901000 has 64 divisors (see below), whose sum is σ = 23468730480. Its totient is φ = 4005772800.

The previous prime is 10021900943. The next prime is 10021901003. The reversal of 10021901000 is 10912001.

It can be written as a sum of positive squares in 8 ways, for example, as 75030244 + 9946870756 = 8662^2 + 99734^2 .

It is not an unprimeable number, because it can be changed into a prime (10021901003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750142 + ... + 1755858.

Almost surely, 2^10021901000 is an apocalyptic number.

10021901000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10021901000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11734365240).

10021901000 is an abundant number, since it is smaller than the sum of its proper divisors (13446829480).

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

10021901000 is a wasteful number, since it uses less digits than its factorization.

10021901000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7491 (or 7477 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 10021901000 in words is "ten billion, twenty-one million, nine hundred one thousand".