21002212222010 has 16 divisors (see below), whose sum is σ = 38259451663776. Its totient is φ = 8299669407888.

The previous prime is 21002212222003. The next prime is 21002212222031. The reversal of 21002212222010 is 1022221220012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21002212222010.

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, 12651934244 + ... + 12651935903.

It is an arithmetic number, because the mean of its divisors is an integer number (2391215728986).

Almost surely, 2^{21002212222010} is an apocalyptic number.

21002212222010 is a deficient number, since it is larger than the sum of its proper divisors (17257239441766).

21002212222010 is a wasteful number, since it uses less digits than its factorization.

21002212222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25303870237.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21002212222010 its reverse (1022221220012), we get a palindrome (22024433442022).

The spelling of 21002212222010 in words is "twenty-one trillion, two billion, two hundred twelve million, two hundred twenty-two thousand, ten".