33112020021 has 4 divisors (see below), whose sum is σ = 44149360032. Its totient is φ = 22074680012.

The previous prime is 33112019981. The next prime is 33112020037. The reversal of 33112020021 is 12002021133.

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.

It is a cyclic number.

It is not a de Polignac number, because 33112020021 - 2¹⁹ = 33111495733 is a prime.

It is a super-2 number, since 2×33112020021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33112020091) 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, 5518670001 + ... + 5518670006.

It is an arithmetic number, because the mean of its divisors is an integer number (11037340008).

Almost surely, 2^33112020021 is an apocalyptic number.

It is an amenable number.

33112020021 is a deficient number, since it is larger than the sum of its proper divisors (11037340011).

33112020021 is a wasteful number, since it uses less digits than its factorization.

33112020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11037340010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 33112020021 its reverse (12002021133), we get a palindrome (45114041154).

The spelling of 33112020021 in words is "thirty-three billion, one hundred twelve million, twenty thousand, twenty-one".