21202202002 has 16 divisors (see below), whose sum is σ = 32420650392. Its totient is φ = 10396350720.

The previous prime is 21202201981. The next prime is 21202202029. The reversal of 21202202002 is 20020220212.

It can be written as a sum of positive squares in 4 ways, for example, as 17358326001 + 3843876001 = 131751^2 + 61999^2 .

It is a super-2 number, since 2×21202202002² (a number of 21 digits) contains 22 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, 216733 + ... + 298960.

Almost surely, 2^21202202002 is an apocalyptic number.

21202202002 is a deficient number, since it is larger than the sum of its proper divisors (11218448390).

21202202002 is a wasteful number, since it uses less digits than its factorization.

21202202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516093.

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

Adding to 21202202002 its reverse (20020220212), we get a palindrome (41222422214).

The spelling of 21202202002 in words is "twenty-one billion, two hundred two million, two hundred two thousand, two".