22000002021 has 12 divisors (see below), whose sum is σ = 33159423648. Its totient is φ = 14028986664.

The previous prime is 22000002019. The next prime is 22000002041. The reversal of 22000002021 is 12020000022.

It is not a de Polignac number, because 22000002021 - 2¹ = 22000002019 is a prime.

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 = 22000001994 and 22000002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000002041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53139895 + ... + 53140308.

It is an arithmetic number, because the mean of its divisors is an integer number (2763285304).

Almost surely, 2^22000002021 is an apocalyptic number.

It is an amenable number.

22000002021 is a deficient number, since it is larger than the sum of its proper divisors (11159421627).

22000002021 is a wasteful number, since it uses less digits than its factorization.

22000002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106280232 (or 106280229 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 22000002021 its reverse (12020000022), we get a palindrome (34020002043).

The spelling of 22000002021 in words is "twenty-two billion, two thousand, twenty-one".