20321131112 has 8 divisors (see below), whose sum is σ = 38102120850. Its totient is φ = 10160565552.

The previous prime is 20321131087. The next prime is 20321131121. The reversal of 20321131112 is 21113112302.

It can be written as a sum of positive squares in only one way, i.e., 13527085636 + 6794045476 = 116306^2 + 82426^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270070687 + ... + 1270070702.

Almost surely, 2^20321131112 is an apocalyptic number.

It is an amenable number.

20321131112 is a deficient number, since it is larger than the sum of its proper divisors (17780989738).

20321131112 is a wasteful number, since it uses less digits than its factorization.

20321131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540141395 (or 2540141391 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20321131112 its reverse (21113112302), we get a palindrome (41434243414).

The spelling of 20321131112 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-one thousand, one hundred twelve".