21002301097 has 2 divisors, whose sum is σ = 21002301098. Its totient is φ = 21002301096.

The previous prime is 21002301071. The next prime is 21002301113. The reversal of 21002301097 is 79010320012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14036562576 + 6965738521 = 118476^2 + 83461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002301097 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002304097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501150548 + 10501150549.

It is an arithmetic number, because the mean of its divisors is an integer number (10501150549).

Almost surely, 2^21002301097 is an apocalyptic number.

It is an amenable number.

21002301097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002301097 is an equidigital number, since it uses as much as digits as its factorization.

21002301097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 21002301097 in words is "twenty-one billion, two million, three hundred one thousand, ninety-seven".