21122001101210 has 16 divisors (see below), whose sum is σ = 38019943540296. Its totient is φ = 8448724538688.

The previous prime is 21122001101207. The next prime is 21122001101249. The reversal of 21122001101210 is 1210110022112.

It can be written as a sum of positive squares in 4 ways, for example, as 15533301795361 + 5588699305849 = 3941231^2 + 2364043^2 .

It is a super-2 number, since 2×21122001101210² (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 7 ways as a sum of consecutive naturals, for example, 8312009 + ... + 10551468.

Almost surely, 2^{21122001101210} is an apocalyptic number.

21122001101210 is a deficient number, since it is larger than the sum of its proper divisors (16897942439086).

21122001101210 is a wasteful number, since it uses less digits than its factorization.

21122001101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18975457.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21122001101210 its reverse (1210110022112), we get a palindrome (22332111123322).

The spelling of 21122001101210 in words is "twenty-one trillion, one hundred twenty-two billion, one million, one hundred one thousand, two hundred ten".