12421861377 has 16 divisors (see below), whose sum is σ = 16730832960. Its totient is φ = 8197409792.

The previous prime is 12421861369. The next prime is 12421861399. The reversal of 12421861377 is 77316812421.

It is a cyclic number.

It is not a de Polignac number, because 12421861377 - 2³ = 12421861369 is a prime.

It is a super-2 number, since 2×12421861377² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12421861337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102274 + ... + 187892.

It is an arithmetic number, because the mean of its divisors is an integer number (1045677060).

Almost surely, 2^12421861377 is an apocalyptic number.

It is an amenable number.

12421861377 is a deficient number, since it is larger than the sum of its proper divisors (4308971583).

12421861377 is a wasteful number, since it uses less digits than its factorization.

12421861377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86112.

The product of its digits is 112896, while the sum is 42.

The spelling of 12421861377 in words is "twelve billion, four hundred twenty-one million, eight hundred sixty-one thousand, three hundred seventy-seven".