21023063004157 has 2 divisors, whose sum is σ = 21023063004158. Its totient is φ = 21023063004156.

The previous prime is 21023063004149. The next prime is 21023063004191. The reversal of 21023063004157 is 75140036032012.

It is an a-pointer prime, because the next prime (21023063004191) can be obtained adding 21023063004157 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21020491905721 + 2571098436 = 4584811^2 + 50706^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023063004157 - 2³ = 21023063004149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023063004107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511531502078 + 10511531502079.

It is an arithmetic number, because the mean of its divisors is an integer number (10511531502079).

Almost surely, 2^{21023063004157} is an apocalyptic number.

It is an amenable number.

21023063004157 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023063004157 is an equidigital number, since it uses as much as digits as its factorization.

21023063004157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 21023063004157 its reverse (75140036032012), we get a palindrome (96163099036169).

The spelling of 21023063004157 in words is "twenty-one trillion, twenty-three billion, sixty-three million, four thousand, one hundred fifty-seven".