20130102232031 has 4 divisors (see below), whose sum is σ = 21960111525864. Its totient is φ = 18300092938200.

The previous prime is 20130102231989. The next prime is 20130102232069. The reversal of 20130102232031 is 13023220103102.

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 20130102232031 - 2¹⁴ = 20130102215647 is a prime.

It is a super-2 number, since 2×20130102232031² (a number of 27 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 = 20130102231994 and 20130102232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130102232231) 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, 915004646900 + ... + 915004646921.

It is an arithmetic number, because the mean of its divisors is an integer number (5490027881466).

Almost surely, 2^{20130102232031} is an apocalyptic number.

20130102232031 is a deficient number, since it is larger than the sum of its proper divisors (1830009293833).

20130102232031 is a wasteful number, since it uses less digits than its factorization.

20130102232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830009293832.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20130102232031 its reverse (13023220103102), we get a palindrome (33153322335133).

The spelling of 20130102232031 in words is "twenty trillion, one hundred thirty billion, one hundred two million, two hundred thirty-two thousand, thirty-one".