33130032021 has 60 divisors (see below), whose sum is σ = 52852603012. Its totient is φ = 20676943872.

The previous prime is 33130032007. The next prime is 33130032077. The reversal of 33130032021 is 12023003133.

33130032021 is a `hidden beast` number, since 331 + 300 + 32 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1198128996 + 31931903025 = 34614^2 + 178695^2 .

It is not a de Polignac number, because 33130032021 - 2¹¹ = 33130029973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33130031985 and 33130032003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33130032521) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4514271 + ... + 4521603.

Almost surely, 2^33130032021 is an apocalyptic number.

It is an amenable number.

33130032021 is a deficient number, since it is larger than the sum of its proper divisors (19722570991).

33130032021 is a wasteful number, since it uses less digits than its factorization.

33130032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572 (or 7546 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 33130032021 its reverse (12023003133), we get a palindrome (45153035154).

The spelling of 33130032021 in words is "thirty-three billion, one hundred thirty million, thirty-two thousand, twenty-one".