33221420131021 has 4 divisors (see below), whose sum is σ = 34031698670844. Its totient is φ = 32411141591200.

The previous prime is 33221420130971. The next prime is 33221420131051. The reversal of 33221420131021 is 12013102412233.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 406693175625 + 32814726955396 = 637725^2 + 5728414^2 .

It is a cyclic number.

It is not a de Polignac number, because 33221420131021 - 2²³ = 33221411742413 is a prime.

It is a super-2 number, since 2×33221420131021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221420131051) 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, 405139269850 + ... + 405139269931.

It is an arithmetic number, because the mean of its divisors is an integer number (8507924667711).

Almost surely, 2^{33221420131021} is an apocalyptic number.

It is an amenable number.

33221420131021 is a deficient number, since it is larger than the sum of its proper divisors (810278539823).

33221420131021 is an equidigital number, since it uses as much as digits as its factorization.

33221420131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810278539822.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 33221420131021 its reverse (12013102412233), we get a palindrome (45234522543254).

The spelling of 33221420131021 in words is "thirty-three trillion, two hundred twenty-one billion, four hundred twenty million, one hundred thirty-one thousand, twenty-one".