33873111421 has 2 divisors, whose sum is σ = 33873111422. Its totient is φ = 33873111420.

The previous prime is 33873111383. The next prime is 33873111431. The reversal of 33873111421 is 12411137833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28007696025 + 5865415396 = 167355^2 + 76586^2 .

It is a cyclic number.

It is not a de Polignac number, because 33873111421 - 2²³ = 33864722813 is a prime.

It is a super-2 number, since 2×33873111421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33873111431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16936555710 + 16936555711.

It is an arithmetic number, because the mean of its divisors is an integer number (16936555711).

Almost surely, 2^33873111421 is an apocalyptic number.

It is an amenable number.

33873111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33873111421 is an equidigital number, since it uses as much as digits as its factorization.

33873111421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The spelling of 33873111421 in words is "thirty-three billion, eight hundred seventy-three million, one hundred eleven thousand, four hundred twenty-one".