21142259707 has 2 divisors, whose sum is σ = 21142259708. Its totient is φ = 21142259706.

The previous prime is 21142259701. The next prime is 21142259753. The reversal of 21142259707 is 70795224112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21142259707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21142259707.

It is not a weakly prime, because it can be changed into another prime (21142259701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571129853 + 10571129854.

It is an arithmetic number, because the mean of its divisors is an integer number (10571129854).

Almost surely, 2^21142259707 is an apocalyptic number.

21142259707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142259707 is an equidigital number, since it uses as much as digits as its factorization.

21142259707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 21142259707 in words is "twenty-one billion, one hundred forty-two million, two hundred fifty-nine thousand, seven hundred seven".