21140429699 has 2 divisors, whose sum is σ = 21140429700. Its totient is φ = 21140429698.

The previous prime is 21140429683. The next prime is 21140429707. The reversal of 21140429699 is 99692404112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140429699 - 2⁴ = 21140429683 is a prime.

It is a super-2 number, since 2×21140429699² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21140429669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570214849 + 10570214850.

It is an arithmetic number, because the mean of its divisors is an integer number (10570214850).

Almost surely, 2^21140429699 is an apocalyptic number.

21140429699 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140429699 is an equidigital number, since it uses as much as digits as its factorization.

21140429699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 21140429699 in words is "twenty-one billion, one hundred forty million, four hundred twenty-nine thousand, six hundred ninety-nine".