23122012201987 has 2 divisors, whose sum is σ = 23122012201988. Its totient is φ = 23122012201986.

The previous prime is 23122012201973. The next prime is 23122012202033. The reversal of 23122012201987 is 78910221022132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23122012201987 is a prime.

It is not a weakly prime, because it can be changed into another prime (23122012201087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561006100993 + 11561006100994.

It is an arithmetic number, because the mean of its divisors is an integer number (11561006100994).

Almost surely, 2^{23122012201987} is an apocalyptic number.

23122012201987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122012201987 is an equidigital number, since it uses as much as digits as its factorization.

23122012201987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 23122012201987 in words is "twenty-three trillion, one hundred twenty-two billion, twelve million, two hundred one thousand, nine hundred eighty-seven".