221021101220101 has 16 divisors (see below), whose sum is σ = 272035890540288. Its totient is φ = 174867461308800.

The previous prime is 221021101220089. The next prime is 221021101220173. The reversal of 221021101220101 is 101022101120122.

It is not a de Polignac number, because 221021101220101 - 2⁵ = 221021101220069 is a prime.

It is a super-2 number, since 2×221021101220101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021101220201) 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, 41774920 + ... + 46767361.

It is an arithmetic number, because the mean of its divisors is an integer number (17002243158768).

Almost surely, 2^{221021101220101} is an apocalyptic number.

It is an amenable number.

221021101220101 is a deficient number, since it is larger than the sum of its proper divisors (51014789320187).

221021101220101 is a wasteful number, since it uses less digits than its factorization.

221021101220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88569732.

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

Adding to 221021101220101 its reverse (101022101120122), we get a palindrome (322043202340223).

The spelling of 221021101220101 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred one".