20121252213 has 4 divisors (see below), whose sum is σ = 26828336288. Its totient is φ = 13414168140.

The previous prime is 20121252211. The next prime is 20121252269. The reversal of 20121252213 is 31225212102.

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 not a de Polignac number, because 20121252213 - 2¹ = 20121252211 is a prime.

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 20121252213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121252211) 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, 3353542033 + ... + 3353542038.

It is an arithmetic number, because the mean of its divisors is an integer number (6707084072).

Almost surely, 2^20121252213 is an apocalyptic number.

It is an amenable number.

20121252213 is a deficient number, since it is larger than the sum of its proper divisors (6707084075).

20121252213 is an equidigital number, since it uses as much as digits as its factorization.

20121252213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707084074.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20121252213 its reverse (31225212102), we get a palindrome (51346464315).

The spelling of 20121252213 in words is "twenty billion, one hundred twenty-one million, two hundred fifty-two thousand, two hundred thirteen".