21302200097 has 4 divisors (see below), whose sum is σ = 21348409236. Its totient is φ = 21255990960.

The previous prime is 21302200091. The next prime is 21302200133. The reversal of 21302200097 is 79000220312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5769313936 + 15532886161 = 75956^2 + 124631^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302200097 - 2¹⁸ = 21301937953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21302200091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23103878 + ... + 23104799.

It is an arithmetic number, because the mean of its divisors is an integer number (5337102309).

Almost surely, 2^21302200097 is an apocalyptic number.

It is an amenable number.

21302200097 is a deficient number, since it is larger than the sum of its proper divisors (46209139).

21302200097 is an equidigital number, since it uses as much as digits as its factorization.

21302200097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46209138.

The product of its (nonzero) digits is 1512, while the sum is 26.

The spelling of 21302200097 in words is "twenty-one billion, three hundred two million, two hundred thousand, ninety-seven".