101221210212101 has 16 divisors (see below), whose sum is σ = 115833805774848. Its totient is φ = 86646749846400.

The previous prime is 101221210212071. The next prime is 101221210212169. The reversal of 101221210212101 is 101212012122101.

It is a cyclic number.

It is not a de Polignac number, because 101221210212101 - 2¹⁸ = 101221209949957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221210212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221210712101) 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, 40039121 + ... + 42492041.

It is an arithmetic number, because the mean of its divisors is an integer number (7239612860928).

Almost surely, 2^{101221210212101} is an apocalyptic number.

It is an amenable number.

101221210212101 is a deficient number, since it is larger than the sum of its proper divisors (14612595562747).

101221210212101 is an equidigital number, since it uses as much as digits as its factorization.

101221210212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460692.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 101221210212101 its reverse (101212012122101), we get a palindrome (202433222334202).

The spelling of 101221210212101 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, one hundred one".