33120021001 has 4 divisors (see below), whose sum is σ = 33176444112. Its totient is φ = 33063597892.

The previous prime is 33120020887. The next prime is 33120021007. The reversal of 33120021001 is 10012002133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10012002133 = 7 ⋅1430286019.

It is a cyclic number.

It is not a de Polignac number, because 33120021001 - 2⁷ = 33120020873 is a prime.

It is a super-2 number, since 2×33120021001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33120021007) 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, 28210675 + ... + 28211848.

It is an arithmetic number, because the mean of its divisors is an integer number (8294111028).

Almost surely, 2^33120021001 is an apocalyptic number.

It is an amenable number.

33120021001 is a deficient number, since it is larger than the sum of its proper divisors (56423111).

33120021001 is an equidigital number, since it uses as much as digits as its factorization.

33120021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56423110.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 33120021001 its reverse (10012002133), we get a palindrome (43132023134).

The spelling of 33120021001 in words is "thirty-three billion, one hundred twenty million, twenty-one thousand, one".