221010100122101 has 2 divisors, whose sum is σ = 221010100122102. Its totient is φ = 221010100122100.

The previous prime is 221010100122067. The next prime is 221010100122143. The reversal of 221010100122101 is 101221001010122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170988287910001 + 50021812212100 = 13076249^2 + 7072610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010100122101 is a prime.

It is a super-2 number, since 2×221010100122101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221010120122101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505050061050 + 110505050061051.

It is an arithmetic number, because the mean of its divisors is an integer number (110505050061051).

Almost surely, 2^{221010100122101} is an apocalyptic number.

It is an amenable number.

221010100122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221010100122101 is an equidigital number, since it uses as much as digits as its factorization.

221010100122101 is an evil number, because the sum of its binary digits is even.

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

Adding to 221010100122101 its reverse (101221001010122), we get a palindrome (322231101132223).

The spelling of 221010100122101 in words is "two hundred twenty-one trillion, ten billion, one hundred million, one hundred twenty-two thousand, one hundred one".