20012111031331 has 16 divisors (see below), whose sum is σ = 22320129031200. Its totient is φ = 17831128831488.

The previous prime is 20012111031251. The next prime is 20012111031349. The reversal of 20012111031331 is 13313011121002.

It is not a de Polignac number, because 20012111031331 - 2¹¹ = 20012111029283 is a prime.

It is a super-2 number, since 2×20012111031331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012111031299 and 20012111031308.

It is not an unprimeable number, because it can be changed into a prime (20012111031361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21216880 + ... + 22140013.

It is an arithmetic number, because the mean of its divisors is an integer number (1395008064450).

Almost surely, 2^{20012111031331} is an apocalyptic number.

20012111031331 is a deficient number, since it is larger than the sum of its proper divisors (2308017999869).

20012111031331 is a wasteful number, since it uses less digits than its factorization.

20012111031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43358358.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 20012111031331 its reverse (13313011121002), we get a palindrome (33325122152333).

The spelling of 20012111031331 in words is "twenty trillion, twelve billion, one hundred eleven million, thirty-one thousand, three hundred thirty-one".