21101301497 has 2 divisors, whose sum is σ = 21101301498. Its totient is φ = 21101301496.

The previous prime is 21101301491. The next prime is 21101301503. The reversal of 21101301497 is 79410310112.

It is a balanced prime because it is at equal distance from previous prime (21101301491) and next prime (21101301503).

It can be written as a sum of positive squares in only one way, i.e., 11605968361 + 9495333136 = 107731^2 + 97444^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101301497 - 2¹² = 21101297401 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101301491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550650748 + 10550650749.

It is an arithmetic number, because the mean of its divisors is an integer number (10550650749).

Almost surely, 2^21101301497 is an apocalyptic number.

It is an amenable number.

21101301497 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101301497 is an equidigital number, since it uses as much as digits as its factorization.

21101301497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 21101301497 in words is "twenty-one billion, one hundred one million, three hundred one thousand, four hundred ninety-seven".