221101010220101 has 32 divisors (see below), whose sum is σ = 264264968880000. Its totient is φ = 182701705697280.

The previous prime is 221101010220089. The next prime is 221101010220127. The reversal of 221101010220101 is 101022010101122.

It is a de Polignac number, because none of the positive numbers 2^k-221101010220101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101010220131) 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, 153760226 + ... + 155191523.

It is an arithmetic number, because the mean of its divisors is an integer number (8258280277500).

Almost surely, 2^{221101010220101} is an apocalyptic number.

It is an amenable number.

221101010220101 is a deficient number, since it is larger than the sum of its proper divisors (43163958659899).

221101010220101 is a wasteful number, since it uses less digits than its factorization.

221101010220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308951909.

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

Adding to 221101010220101 its reverse (101022010101122), we get a palindrome (322123020321223).

The spelling of 221101010220101 in words is "two hundred twenty-one trillion, one hundred one billion, ten million, two hundred twenty thousand, one hundred one".