37653112121 has 4 divisors (see below), whose sum is σ = 37710076644. Its totient is φ = 37596147600.

The previous prime is 37653112109. The next prime is 37653112139. The reversal of 37653112121 is 12121135673.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12121135673 = 30559 ⋅396647.

It can be written as a sum of positive squares in 2 ways, for example, as 17125386496 + 20527725625 = 130864^2 + 143275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37653112121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37653112921) 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, 28481270 + ... + 28482591.

It is an arithmetic number, because the mean of its divisors is an integer number (9427519161).

Almost surely, 2^37653112121 is an apocalyptic number.

It is an amenable number.

37653112121 is a deficient number, since it is larger than the sum of its proper divisors (56964523).

37653112121 is an equidigital number, since it uses as much as digits as its factorization.

37653112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56964522.

The product of its digits is 7560, while the sum is 32.

Adding to 37653112121 its reverse (12121135673), we get a palindrome (49774247794).

The spelling of 37653112121 in words is "thirty-seven billion, six hundred fifty-three million, one hundred twelve thousand, one hundred twenty-one".