23221121387 has 2 divisors, whose sum is σ = 23221121388. Its totient is φ = 23221121386.

The previous prime is 23221121269. The next prime is 23221121419. The reversal of 23221121387 is 78312112232.

It is an a-pointer prime, because the next prime (23221121419) can be obtained adding 23221121387 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23221121387 - 2¹² = 23221117291 is a prime.

It is not a weakly prime, because it can be changed into another prime (23221121587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610560693 + 11610560694.

It is an arithmetic number, because the mean of its divisors is an integer number (11610560694).

Almost surely, 2^23221121387 is an apocalyptic number.

23221121387 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221121387 is an equidigital number, since it uses as much as digits as its factorization.

23221121387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The spelling of 23221121387 in words is "twenty-three billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred eighty-seven".