22021001010 has 40 divisors (see below), whose sum is σ = 59212027116. Its totient is φ = 5872266720.

The previous prime is 22021000999. The next prime is 22021001011. The reversal of 22021001010 is 1010012022.

It can be written as a sum of positive squares in 2 ways, for example, as 19881846009 + 2139155001 = 141003^2 + 46251^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22021000983 and 22021001001.

It is not an unprimeable number, because it can be changed into a prime (22021001011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13592401 + ... + 13594020.

Almost surely, 2^22021001010 is an apocalyptic number.

22021001010 is an abundant number, since it is smaller than the sum of its proper divisors (37191026106).

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

22021001010 is a wasteful number, since it uses less digits than its factorization.

22021001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27186440 (or 27186431 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22021001010 its reverse (1010012022), we get a palindrome (23031013032).

The spelling of 22021001010 in words is "twenty-two billion, twenty-one million, one thousand, ten".