21011021102202 has 64 divisors (see below), whose sum is σ = 43091590405248. Its totient is φ = 6825772800000.

The previous prime is 21011021102087. The next prime is 21011021102213. The reversal of 21011021102202 is 20220112011012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1755154077 + ... + 1755166047.

It is an arithmetic number, because the mean of its divisors is an integer number (673306100082).

Almost surely, 2^{21011021102202} is an apocalyptic number.

21011021102202 is an abundant number, since it is smaller than the sum of its proper divisors (22080569303046).

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

21011021102202 is a wasteful number, since it uses less digits than its factorization.

21011021102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18815.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21011021102202 its reverse (20220112011012), we get a palindrome (41231133113214).

The spelling of 21011021102202 in words is "twenty-one trillion, eleven billion, twenty-one million, one hundred two thousand, two hundred two".