21011102222210 has 32 divisors (see below), whose sum is σ = 38454634733760. Its totient is φ = 8263866042432.

The previous prime is 21011102222167. The next prime is 21011102222237. The reversal of 21011102222210 is 1222220111012.

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, 28298825 + ... + 29031804.

It is an arithmetic number, because the mean of its divisors is an integer number (1201707335430).

Almost surely, 2^{21011102222210} is an apocalyptic number.

21011102222210 is a deficient number, since it is larger than the sum of its proper divisors (17443532511550).

21011102222210 is a wasteful number, since it uses less digits than its factorization.

21011102222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57331250.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21011102222210 its reverse (1222220111012), we get a palindrome (22233322333222).

The spelling of 21011102222210 in words is "twenty-one trillion, eleven billion, one hundred two million, two hundred twenty-two thousand, two hundred ten".