21012002202 has 16 divisors (see below), whose sum is σ = 43001307360. Its totient is φ = 6841116912.

The previous prime is 21012002197. The next prime is 21012002243. The reversal of 21012002202 is 20220021012.

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, 40720677 + ... + 40721192.

It is an arithmetic number, because the mean of its divisors is an integer number (2687581710).

Almost surely, 2^21012002202 is an apocalyptic number.

21012002202 is an abundant number, since it is smaller than the sum of its proper divisors (21989305158).

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

21012002202 is a wasteful number, since it uses less digits than its factorization.

21012002202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81441917.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21012002202 its reverse (20220021012), we get a palindrome (41232023214).

The spelling of 21012002202 in words is "twenty-one billion, twelve million, two thousand, two hundred two".