21122740699 has 2 divisors, whose sum is σ = 21122740700. Its totient is φ = 21122740698.

The previous prime is 21122740679. The next prime is 21122740753. The reversal of 21122740699 is 99604722112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21122740699 - 2⁹ = 21122740187 is a prime.

It is not a weakly prime, because it can be changed into another prime (21122740609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561370349 + 10561370350.

It is an arithmetic number, because the mean of its divisors is an integer number (10561370350).

Almost surely, 2^21122740699 is an apocalyptic number.

21122740699 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122740699 is an equidigital number, since it uses as much as digits as its factorization.

21122740699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 21122740699 in words is "twenty-one billion, one hundred twenty-two million, seven hundred forty thousand, six hundred ninety-nine".