38910110021021 has 4 divisors (see below), whose sum is σ = 38924452121052. Its totient is φ = 38895767920992.

The previous prime is 38910110021009. The next prime is 38910110021051. The reversal of 38910110021021 is 12012001101983.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33621604915396 + 5288505105625 = 5798414^2 + 2299675^2 .

It is a cyclic number.

It is not a de Polignac number, because 38910110021021 - 2³⁴ = 38892930151837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38910110021051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7171045946 + ... + 7171051371.

It is an arithmetic number, because the mean of its divisors is an integer number (9731113030263).

Almost surely, 2^{38910110021021} is an apocalyptic number.

It is an amenable number.

38910110021021 is a deficient number, since it is larger than the sum of its proper divisors (14342100031).

38910110021021 is a wasteful number, since it uses less digits than its factorization.

38910110021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14342100030.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 38910110021021 in words is "thirty-eight trillion, nine hundred ten billion, one hundred ten million, twenty-one thousand, twenty-one".