221002211210101 has 4 divisors (see below), whose sum is σ = 221066066229804. Its totient is φ = 220938356190400.

The previous prime is 221002211210071. The next prime is 221002211210197. The reversal of 221002211210101 is 101012112200122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68338246223025 + 152663964987076 = 8266695^2 + 12355726^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002211210101 - 2⁵ = 221002211210069 is a prime.

It is a super-2 number, since 2×221002211210101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002211220101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31927504660 + ... + 31927511581.

It is an arithmetic number, because the mean of its divisors is an integer number (55266516557451).

Almost surely, 2^{221002211210101} is an apocalyptic number.

It is an amenable number.

221002211210101 is a deficient number, since it is larger than the sum of its proper divisors (63855019703).

221002211210101 is an equidigital number, since it uses as much as digits as its factorization.

221002211210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63855019702.

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

Adding to 221002211210101 its reverse (101012112200122), we get a palindrome (322014323410223).

The spelling of 221002211210101 in words is "two hundred twenty-one trillion, two billion, two hundred eleven million, two hundred ten thousand, one hundred one".