21120211220110 has 32 divisors (see below), whose sum is σ = 38508897802752. Its totient is φ = 8339163595680.

The previous prime is 21120211220093. The next prime is 21120211220111. The reversal of 21120211220110 is 1102211202112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120211220111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32646004 + ... + 33286663.

It is an arithmetic number, because the mean of its divisors is an integer number (1203403056336).

Almost surely, 2^{21120211220110} is an apocalyptic number.

21120211220110 is a deficient number, since it is larger than the sum of its proper divisors (17388686582642).

21120211220110 is a wasteful number, since it uses less digits than its factorization.

21120211220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65933088.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120211220110 its reverse (1102211202112), we get a palindrome (22222422422222).

The spelling of 21120211220110 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty thousand, one hundred ten".