21011002202 has 16 divisors (see below), whose sum is σ = 33575150592. Its totient is φ = 9826868160.

The previous prime is 21011002183. The next prime is 21011002217. The reversal of 21011002202 is 20220011012.

It is a happy number.

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, 1890074 + ... + 1901157.

It is an arithmetic number, because the mean of its divisors is an integer number (2098446912).

Almost surely, 2^21011002202 is an apocalyptic number.

21011002202 is a deficient number, since it is larger than the sum of its proper divisors (12564148390).

21011002202 is a wasteful number, since it uses less digits than its factorization.

21011002202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791413.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21011002202 its reverse (20220011012), we get a palindrome (41231013214).

The spelling of 21011002202 in words is "twenty-one billion, eleven million, two thousand, two hundred two".