12021871937 has 2 divisors, whose sum is σ = 12021871938. Its totient is φ = 12021871936.

The previous prime is 12021871933. The next prime is 12021871991. The reversal of 12021871937 is 73917812021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8167821376 + 3854050561 = 90376^2 + 62081^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021871937 - 2² = 12021871933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021871894 and 12021871903.

It is not a weakly prime, because it can be changed into another prime (12021871933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010935968 + 6010935969.

It is an arithmetic number, because the mean of its divisors is an integer number (6010935969).

Almost surely, 2^12021871937 is an apocalyptic number.

It is an amenable number.

12021871937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021871937 is an equidigital number, since it uses as much as digits as its factorization.

12021871937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 12021871937 in words is "twelve billion, twenty-one million, eight hundred seventy-one thousand, nine hundred thirty-seven".