21214036274533 has 2 divisors, whose sum is σ = 21214036274534. Its totient is φ = 21214036274532.

The previous prime is 21214036274429. The next prime is 21214036274567. The reversal of 21214036274533 is 33547263041212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10962045566404 + 10251990708129 = 3310898^2 + 3201873^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214036274533 - 2¹³ = 21214036266341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21214036274533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036274033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607018137266 + 10607018137267.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018137267).

Almost surely, 2^{21214036274533} is an apocalyptic number.

It is an amenable number.

21214036274533 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036274533 is an equidigital number, since it uses as much as digits as its factorization.

21214036274533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 21214036274533 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, two hundred seventy-four thousand, five hundred thirty-three".