20130212031 has 4 divisors (see below), whose sum is σ = 26840282712. Its totient is φ = 13420141352.

The previous prime is 20130211967. The next prime is 20130212051. The reversal of 20130212031 is 13021203102.

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 20130212031 - 2⁶ = 20130211967 is a prime.

It is a super-2 number, since 2×20130212031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20130212031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130212051) 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, 3355035336 + ... + 3355035341.

It is an arithmetic number, because the mean of its divisors is an integer number (6710070678).

Almost surely, 2^20130212031 is an apocalyptic number.

20130212031 is a deficient number, since it is larger than the sum of its proper divisors (6710070681).

20130212031 is an equidigital number, since it uses as much as digits as its factorization.

20130212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710070680.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20130212031 its reverse (13021203102), we get a palindrome (33151415133).

The spelling of 20130212031 in words is "twenty billion, one hundred thirty million, two hundred twelve thousand, thirty-one".