21013232133097 has 2 divisors, whose sum is σ = 21013232133098. Its totient is φ = 21013232133096.

The previous prime is 21013232133073. The next prime is 21013232133151. The reversal of 21013232133097 is 79033123231012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19492410430441 + 1520821702656 = 4415021^2 + 1233216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21013232133097 is a prime.

It is a super-2 number, since 2×21013232133097² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21013232133017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506616066548 + 10506616066549.

It is an arithmetic number, because the mean of its divisors is an integer number (10506616066549).

Almost surely, 2^{21013232133097} is an apocalyptic number.

It is an amenable number.

21013232133097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013232133097 is an equidigital number, since it uses as much as digits as its factorization.

21013232133097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The spelling of 21013232133097 in words is "twenty-one trillion, thirteen billion, two hundred thirty-two million, one hundred thirty-three thousand, ninety-seven".