21220102093 has 2 divisors, whose sum is σ = 21220102094. Its totient is φ = 21220102092.

The previous prime is 21220102069. The next prime is 21220102097. The reversal of 21220102093 is 39020102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17802764329 + 3417337764 = 133427^2 + 58458^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220102093 - 2⁵ = 21220102061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220102097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610051046 + 10610051047.

It is an arithmetic number, because the mean of its divisors is an integer number (10610051047).

Almost surely, 2^21220102093 is an apocalyptic number.

It is an amenable number.

21220102093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220102093 is an equidigital number, since it uses as much as digits as its factorization.

21220102093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 21220102093 in words is "twenty-one billion, two hundred twenty million, one hundred two thousand, ninety-three".