20312221012112 has 10 divisors (see below), whose sum is σ = 39354928210998. Its totient is φ = 10156110506048.

The previous prime is 20312221012051. The next prime is 20312221012217. The reversal of 20312221012112 is 21121012221302.

It can be written as a sum of positive squares in only one way, i.e., 18021587193856 + 2290633818256 = 4245184^2 + 1513484^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634756906613 + ... + 634756906644.

Almost surely, 2^{20312221012112} is an apocalyptic number.

It is an amenable number.

20312221012112 is a deficient number, since it is larger than the sum of its proper divisors (19042707198886).

20312221012112 is a wasteful number, since it uses less digits than its factorization.

20312221012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269513813265 (or 1269513813259 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20312221012112 its reverse (21121012221302), we get a palindrome (41433233233414).

The spelling of 20312221012112 in words is "twenty trillion, three hundred twelve billion, two hundred twenty-one million, twelve thousand, one hundred twelve".