212220311131 has 4 divisors (see below), whose sum is σ = 212225917432. Its totient is φ = 212214704832.

The previous prime is 212220311119. The next prime is 212220311153. The reversal of 212220311131 is 131113022212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212220311131 - 2⁷ = 212220311003 is a prime.

It is a super-2 number, since 2×212220311131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212220311099 and 212220311108.

It is not an unprimeable number, because it can be changed into a prime (212220311431) 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, 2745981 + ... + 2822206.

It is an arithmetic number, because the mean of its divisors is an integer number (53056479358).

Almost surely, 2^212220311131 is an apocalyptic number.

212220311131 is a deficient number, since it is larger than the sum of its proper divisors (5606301).

212220311131 is an equidigital number, since it uses as much as digits as its factorization.

212220311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606300.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212220311131 its reverse (131113022212), we get a palindrome (343333333343).

The spelling of 212220311131 in words is "two hundred twelve billion, two hundred twenty million, three hundred eleven thousand, one hundred thirty-one".