20221220002 has 16 divisors (see below), whose sum is σ = 30560726520. Its totient is φ = 10034347648.

The previous prime is 20221219979. The next prime is 20221220023. The reversal of 20221220002 is 20002212202.

It can be written as a sum of positive squares in 4 ways, for example, as 15810799081 + 4410420921 = 125741^2 + 66411^2 .

It is a super-3 number, since 3×20221220002³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1692024 + ... + 1703932.

Almost surely, 2^20221220002 is an apocalyptic number.

20221220002 is a deficient number, since it is larger than the sum of its proper divisors (10339506518).

20221220002 is a wasteful number, since it uses less digits than its factorization.

20221220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18245.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20221220002 its reverse (20002212202), we get a palindrome (40223432204).

The spelling of 20221220002 in words is "twenty billion, two hundred twenty-one million, two hundred twenty thousand, two".