38912010215021 has 2 divisors, whose sum is σ = 38912010215022. Its totient is φ = 38912010215020.

The previous prime is 38912010215003. The next prime is 38912010215107. The reversal of 38912010215021 is 12051201021983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36412414432900 + 2499595782121 = 6034270^2 + 1581011^2 .

It is a cyclic number.

It is not a de Polignac number, because 38912010215021 - 2¹⁴ = 38912010198637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38912010218021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19456005107510 + 19456005107511.

It is an arithmetic number, because the mean of its divisors is an integer number (19456005107511).

Almost surely, 2^{38912010215021} is an apocalyptic number.

It is an amenable number.

38912010215021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38912010215021 is an equidigital number, since it uses as much as digits as its factorization.

38912010215021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 38912010215021 in words is "thirty-eight trillion, nine hundred twelve billion, ten million, two hundred fifteen thousand, twenty-one".