20312222101 has 4 divisors (see below), whose sum is σ = 20967455104. Its totient is φ = 19656989100.

The previous prime is 20312222089. The next prime is 20312222111. The reversal of 20312222101 is 10122221302.

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 20312222101 - 2¹¹ = 20312220053 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 (20312222111) 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, 327616455 + ... + 327616516.

It is an arithmetic number, because the mean of its divisors is an integer number (5241863776).

Almost surely, 2^20312222101 is an apocalyptic number.

It is an amenable number.

20312222101 is a deficient number, since it is larger than the sum of its proper divisors (655233003).

20312222101 is an equidigital number, since it uses as much as digits as its factorization.

20312222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655233002.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20312222101 its reverse (10122221302), we get a palindrome (30434443403).

The spelling of 20312222101 in words is "twenty billion, three hundred twelve million, two hundred twenty-two thousand, one hundred one".