21214036274429 has 2 divisors, whose sum is σ = 21214036274430. Its totient is φ = 21214036274428.

The previous prime is 21214036274407. The next prime is 21214036274533. The reversal of 21214036274429 is 92447263041212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14180481427204 + 7033554847225 = 3765698^2 + 2652085^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214036274429 - 2¹² = 21214036270333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036274029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607018137214 + 10607018137215.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018137215).

Almost surely, 2^{21214036274429} is an apocalyptic number.

It is an amenable number.

21214036274429 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036274429 is an equidigital number, since it uses as much as digits as its factorization.

21214036274429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 21214036274429 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, two hundred seventy-four thousand, four hundred twenty-nine".