33986894121 has 12 divisors (see below), whose sum is σ = 49346546548. Its totient is φ = 22540529664.

The previous prime is 33986894111. The next prime is 33986894167. The reversal of 33986894121 is 12149868933.

It can be written as a sum of positive squares in 2 ways, for example, as 12454560000 + 21532334121 = 111600^2 + 146739^2 .

It is not a de Polignac number, because 33986894121 - 2⁹ = 33986893609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33986894111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9781480 + ... + 9784953.

Almost surely, 2^33986894121 is an apocalyptic number.

It is an amenable number.

33986894121 is a deficient number, since it is larger than the sum of its proper divisors (15359652427).

33986894121 is a wasteful number, since it uses less digits than its factorization.

33986894121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19566632 (or 19566629 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 33986894121 in words is "thirty-three billion, nine hundred eighty-six million, eight hundred ninety-four thousand, one hundred twenty-one".