20312130111 has 48 divisors (see below), whose sum is σ = 35487500544. Its totient is φ = 10083820032.

The previous prime is 20312130103. The next prime is 20312130119. The reversal of 20312130111 is 11103121302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20312130103) and next prime (20312130119).

It is not a de Polignac number, because 20312130111 - 2³ = 20312130103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312130119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108001 + ... + 228666.

It is an arithmetic number, because the mean of its divisors is an integer number (739322928).

Almost surely, 2^20312130111 is an apocalyptic number.

20312130111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20312130111 is a deficient number, since it is larger than the sum of its proper divisors (15175370433).

20312130111 is a wasteful number, since it uses less digits than its factorization.

20312130111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336720 (or 336707 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20312130111 its reverse (11103121302), we get a palindrome (31415251413).

The spelling of 20312130111 in words is "twenty billion, three hundred twelve million, one hundred thirty thousand, one hundred eleven".