101213222021 has 4 divisors (see below), whose sum is σ = 101232392844. Its totient is φ = 101194051200.

The previous prime is 101213221999. The next prime is 101213222029. The reversal of 101213222021 is 120222312101.

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 3768732100 + 97444489921 = 61390^2 + 312161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101213222021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101213222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9577490 + ... + 9588051.

It is an arithmetic number, because the mean of its divisors is an integer number (25308098211).

Almost surely, 2^101213222021 is an apocalyptic number.

It is an amenable number.

101213222021 is a deficient number, since it is larger than the sum of its proper divisors (19170823).

101213222021 is an equidigital number, since it uses as much as digits as its factorization.

101213222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19170822.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 101213222021 its reverse (120222312101), we get a palindrome (221435534122).

The spelling of 101213222021 in words is "one hundred one billion, two hundred thirteen million, two hundred twenty-two thousand, twenty-one".