20120312213 has 4 divisors (see below), whose sum is σ = 20175136320. Its totient is φ = 20065488108.

The previous prime is 20120312167. The next prime is 20120312231. The reversal of 20120312213 is 31221302102.

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 20120312213 - 2²⁸ = 19851876757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120312191 and 20120312200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120312813) 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, 27411503 + ... + 27412236.

It is an arithmetic number, because the mean of its divisors is an integer number (5043784080).

Almost surely, 2^20120312213 is an apocalyptic number.

It is an amenable number.

20120312213 is a deficient number, since it is larger than the sum of its proper divisors (54824107).

20120312213 is an equidigital number, since it uses as much as digits as its factorization.

20120312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54824106.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20120312213 its reverse (31221302102), we get a palindrome (51341614315).

The spelling of 20120312213 in words is "twenty billion, one hundred twenty million, three hundred twelve thousand, two hundred thirteen".