101211221122021 has 4 divisors (see below), whose sum is σ = 101222635501152. Its totient is φ = 101199806742892.

The previous prime is 101211221121971. The next prime is 101211221122057. The reversal of 101211221122021 is 120221122112101.

It is a happy number.

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 101211221122021 - 2²⁷ = 101211086904293 is a prime.

It is a super-2 number, since 2×101211221122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101211221122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211221122621) 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, 5707176265 + ... + 5707193998.

It is an arithmetic number, because the mean of its divisors is an integer number (25305658875288).

Almost surely, 2^{101211221122021} is an apocalyptic number.

It is an amenable number.

101211221122021 is a deficient number, since it is larger than the sum of its proper divisors (11414379131).

101211221122021 is an equidigital number, since it uses as much as digits as its factorization.

101211221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11414379130.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101211221122021 its reverse (120221122112101), we get a palindrome (221432343234122).

The spelling of 101211221122021 in words is "one hundred one trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".