21122210221210 has 32 divisors (see below), whose sum is σ = 43451710180992. Its totient is φ = 7241849597760.

The previous prime is 21122210221187. The next prime is 21122210221223. The reversal of 21122210221210 is 1212201222112.

It is a super-2 number, since 2×21122210221210² (a number of 27 digits) contains 22 as substring.

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, 9711900 + ... + 11686120.

It is an arithmetic number, because the mean of its divisors is an integer number (1357865943156).

Almost surely, 2^{21122210221210} is an apocalyptic number.

21122210221210 is an abundant number, since it is smaller than the sum of its proper divisors (22329499959782).

21122210221210 is a wasteful number, since it uses less digits than its factorization.

21122210221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127078.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122210221210 its reverse (1212201222112), we get a palindrome (22334411443322).

The spelling of 21122210221210 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, two hundred twenty-one thousand, two hundred ten".