12121277637 has 24 divisors (see below), whose sum is σ = 18948412416. Its totient is φ = 6871894848.

The previous prime is 12121277617. The next prime is 12121277653. The reversal of 12121277637 is 73677212121.

It is not a de Polignac number, because 12121277637 - 2¹⁴ = 12121261253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121277595 and 12121277604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121277617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305968 + ... + 343305.

It is an arithmetic number, because the mean of its divisors is an integer number (789517184).

Almost surely, 2^12121277637 is an apocalyptic number.

It is an amenable number.

12121277637 is a deficient number, since it is larger than the sum of its proper divisors (6827134779).

12121277637 is a wasteful number, since it uses less digits than its factorization.

12121277637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649417 (or 649410 counting only the distinct ones).

The product of its digits is 49392, while the sum is 39.

Adding to 12121277637 its reverse (73677212121), we get a palindrome (85798489758).

The spelling of 12121277637 in words is "twelve billion, one hundred twenty-one million, two hundred seventy-seven thousand, six hundred thirty-seven".