2112139973 has 4 divisors (see below), whose sum is σ = 2118192300. Its totient is φ = 2106087648.

The previous prime is 2112139961. The next prime is 2112139987. The reversal of 2112139973 is 3799312112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1552202404 + 559937569 = 39398^2 + 23663^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112139973 - 2⁸ = 2112139717 is a prime.

It is a super-2 number, since 2×2112139973² = 8922270531088881458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112139943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3025640 + ... + 3026337.

It is an arithmetic number, because the mean of its divisors is an integer number (529548075).

Almost surely, 2^2112139973 is an apocalyptic number.

It is an amenable number.

2112139973 is a deficient number, since it is larger than the sum of its proper divisors (6052327).

2112139973 is an equidigital number, since it uses as much as digits as its factorization.

2112139973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052326.

The product of its digits is 20412, while the sum is 38.

The square root of 2112139973 is about 45958.0240328063. The cubic root of 2112139973 is about 1283.0420753244.

It can be divided in two parts, 2112139 and 973, that added together give a palindrome (2113112).

The spelling of 2112139973 in words is "two billion, one hundred twelve million, one hundred thirty-nine thousand, nine hundred seventy-three".