21221110100202 has 32 divisors (see below), whose sum is σ = 42983068876800. Its totient is φ = 6983576943408.

The previous prime is 21221110100161. The next prime is 21221110100233. The reversal of 21221110100202 is 20200101112212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3796743 + ... + 7540389.

It is an arithmetic number, because the mean of its divisors is an integer number (1343220902400).

Almost surely, 2^{21221110100202} is an apocalyptic number.

21221110100202 is an abundant number, since it is smaller than the sum of its proper divisors (21761958776598).

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

21221110100202 is a wasteful number, since it uses less digits than its factorization.

21221110100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755690.

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

Adding to 21221110100202 its reverse (20200101112212), we get a palindrome (41421211212414).

The spelling of 21221110100202 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred thousand, two hundred two".