21101220110010 has 64 divisors (see below), whose sum is σ = 51833577438720. Its totient is φ = 5494762862400.

The previous prime is 21101220109973. The next prime is 21101220110011. The reversal of 21101220110010 is 1001102210112.

It is a super-2 number, since 2×21101220110010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101220110011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3149485 + ... + 7219535.

It is an arithmetic number, because the mean of its divisors is an integer number (809899647480).

Almost surely, 2^{21101220110010} is an apocalyptic number.

21101220110010 is an abundant number, since it is smaller than the sum of its proper divisors (30732357328710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101220110010 is a wasteful number, since it uses less digits than its factorization.

21101220110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074123.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101220110010 its reverse (1001102210112), we get a palindrome (22102322320122).

The spelling of 21101220110010 in words is "twenty-one trillion, one hundred one billion, two hundred twenty million, one hundred ten thousand, ten".