37991212001 has 2 divisors, whose sum is σ = 37991212002. Its totient is φ = 37991212000.

The previous prime is 37991211991. The next prime is 37991212027. The reversal of 37991212001 is 10021219973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28190410000 + 9800802001 = 167900^2 + 98999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37991212001 is a prime.

It is not a weakly prime, because it can be changed into another prime (37991212031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18995606000 + 18995606001.

It is an arithmetic number, because the mean of its divisors is an integer number (18995606001).

Almost surely, 2^37991212001 is an apocalyptic number.

It is an amenable number.

37991212001 is a deficient number, since it is larger than the sum of its proper divisors (1).

37991212001 is an equidigital number, since it uses as much as digits as its factorization.

37991212001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 37991212001 in words is "thirty-seven billion, nine hundred ninety-one million, two hundred twelve thousand, one".