101211210020221 has 4 divisors (see below), whose sum is σ = 115669954308832. Its totient is φ = 86752465731612.

The previous prime is 101211210020183. The next prime is 101211210020269. The reversal of 101211210020221 is 122020012112101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101211210020221 - 2²⁹ = 101210673149309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101211210020195 and 101211210020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211210020281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7229372144295 + ... + 7229372144308.

It is an arithmetic number, because the mean of its divisors is an integer number (28917488577208).

Almost surely, 2^{101211210020221} is an apocalyptic number.

It is an amenable number.

101211210020221 is a deficient number, since it is larger than the sum of its proper divisors (14458744288611).

101211210020221 is an equidigital number, since it uses as much as digits as its factorization.

101211210020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14458744288610.

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

Adding to 101211210020221 its reverse (122020012112101), we get a palindrome (223231222132322).

The spelling of 101211210020221 in words is "one hundred one trillion, two hundred eleven billion, two hundred ten million, twenty thousand, two hundred twenty-one".