221020100212110 has 32 divisors (see below), whose sum is σ = 532142963344800. Its totient is φ = 58750390852608.

The previous prime is 221020100212099. The next prime is 221020100212117. The reversal of 221020100212110 is 11212001020122.

It is a super-2 number, since 2×221020100212110² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221020100212110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020100212117) 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, 11768899035 + ... + 11768917814.

It is an arithmetic number, because the mean of its divisors is an integer number (16629467604525).

Almost surely, 2^{221020100212110} is an apocalyptic number.

221020100212110 is an abundant number, since it is smaller than the sum of its proper divisors (311122863132690).

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

221020100212110 is a wasteful number, since it uses less digits than its factorization.

221020100212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23537817172.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221020100212110 its reverse (11212001020122), we get a palindrome (232232101232232).

The spelling of 221020100212110 in words is "two hundred twenty-one trillion, twenty billion, one hundred million, two hundred twelve thousand, one hundred ten".