38912002121 has 4 divisors (see below), whose sum is σ = 39963677892. Its totient is φ = 37860326352.

The previous prime is 38912002099. The next prime is 38912002201. The reversal of 38912002121 is 12120021983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12120021983 = 12589 ⋅962747.

It can be written as a sum of positive squares in 2 ways, for example, as 30323346496 + 8588655625 = 174136^2 + 92675^2 .

It is a cyclic number.

It is not a de Polignac number, because 38912002121 - 2²² = 38907807817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38912002421) 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, 525837830 + ... + 525837903.

It is an arithmetic number, because the mean of its divisors is an integer number (9990919473).

Almost surely, 2^38912002121 is an apocalyptic number.

It is an amenable number.

38912002121 is a deficient number, since it is larger than the sum of its proper divisors (1051675771).

38912002121 is a wasteful number, since it uses less digits than its factorization.

38912002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051675770.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 38912002121 in words is "thirty-eight billion, nine hundred twelve million, two thousand, one hundred twenty-one".