23011221287 has 2 divisors, whose sum is σ = 23011221288. Its totient is φ = 23011221286.

The previous prime is 23011221209. The next prime is 23011221293. The reversal of 23011221287 is 78212211032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23011221287 - 2¹² = 23011217191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23011221487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11505610643 + 11505610644.

It is an arithmetic number, because the mean of its divisors is an integer number (11505610644).

Almost surely, 2^23011221287 is an apocalyptic number.

23011221287 is a deficient number, since it is larger than the sum of its proper divisors (1).

23011221287 is an equidigital number, since it uses as much as digits as its factorization.

23011221287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 23011221287 in words is "twenty-three billion, eleven million, two hundred twenty-one thousand, two hundred eighty-seven".