33140245421 has 2 divisors, whose sum is σ = 33140245422. Its totient is φ = 33140245420.

The previous prime is 33140245409. The next prime is 33140245477. The reversal of 33140245421 is 12454204133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22144416100 + 10995829321 = 148810^2 + 104861^2 .

It is a cyclic number.

It is not a de Polignac number, because 33140245421 - 2⁶ = 33140245357 is a prime.

It is a super-2 number, since 2×33140245421² (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 (33140245121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16570122710 + 16570122711.

It is an arithmetic number, because the mean of its divisors is an integer number (16570122711).

Almost surely, 2^33140245421 is an apocalyptic number.

It is an amenable number.

33140245421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33140245421 is an equidigital number, since it uses as much as digits as its factorization.

33140245421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 33140245421 its reverse (12454204133), we get a palindrome (45594449554).

The spelling of 33140245421 in words is "thirty-three billion, one hundred forty million, two hundred forty-five thousand, four hundred twenty-one".