21122112211010 has 16 divisors (see below), whose sum is σ = 38023392670200. Its totient is φ = 8448046953216.

The previous prime is 21122112211009. The next prime is 21122112211061. The reversal of 21122112211010 is 1011221122112.

It can be written as a sum of positive squares in 4 ways, for example, as 18892922866801 + 2229189344209 = 4346599^2 + 1493047^2 .

It is a super-2 number, since 2×21122112211010² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122112211010.

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, 99630215 + ... + 99841994.

Almost surely, 2^{21122112211010} is an apocalyptic number.

21122112211010 is a deficient number, since it is larger than the sum of its proper divisors (16901280459190).

21122112211010 is a wasteful number, since it uses less digits than its factorization.

21122112211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199482805.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21122112211010 its reverse (1011221122112), we get a palindrome (22133333333122).

The spelling of 21122112211010 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred eleven thousand, ten".