21323201101157 has 2 divisors, whose sum is σ = 21323201101158. Its totient is φ = 21323201101156.

The previous prime is 21323201101099. The next prime is 21323201101177. The reversal of 21323201101157 is 75110110232312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21242503063681 + 80698037476 = 4608959^2 + 284074^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323201101157 - 2¹⁶ = 21323201035621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323201101177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661600550578 + 10661600550579.

It is an arithmetic number, because the mean of its divisors is an integer number (10661600550579).

Almost surely, 2^{21323201101157} is an apocalyptic number.

It is an amenable number.

21323201101157 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323201101157 is an equidigital number, since it uses as much as digits as its factorization.

21323201101157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 21323201101157 its reverse (75110110232312), we get a palindrome (96433311333469).

The spelling of 21323201101157 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred one million, one hundred one thousand, one hundred fifty-seven".