21142400299 has 2 divisors, whose sum is σ = 21142400300. Its totient is φ = 21142400298.

The previous prime is 21142400287. The next prime is 21142400327. The reversal of 21142400299 is 99200424112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21142400299 - 2⁹ = 21142399787 is a prime.

It is not a weakly prime, because it can be changed into another prime (21142400219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571200149 + 10571200150.

It is an arithmetic number, because the mean of its divisors is an integer number (10571200150).

Almost surely, 2^21142400299 is an apocalyptic number.

21142400299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142400299 is an equidigital number, since it uses as much as digits as its factorization.

21142400299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 21142400299 in words is "twenty-one billion, one hundred forty-two million, four hundred thousand, two hundred ninety-nine".