20101321312 has 24 divisors (see below), whose sum is σ = 39944338056. Its totient is φ = 9956727552.

The previous prime is 20101321267. The next prime is 20101321321. The reversal of 20101321312 is 21312310102.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2931933 + ... + 2938780.

It is an arithmetic number, because the mean of its divisors is an integer number (1664347419).

Almost surely, 2^20101321312 is an apocalyptic number.

It is an amenable number.

20101321312 is a deficient number, since it is larger than the sum of its proper divisors (19843016744).

20101321312 is a wasteful number, since it uses less digits than its factorization.

20101321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870830 (or 5870822 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20101321312 its reverse (21312310102), we get a palindrome (41413631414).

The spelling of 20101321312 in words is "twenty billion, one hundred one million, three hundred twenty-one thousand, three hundred twelve".