21210231026093 has 2 divisors, whose sum is σ = 21210231026094. Its totient is φ = 21210231026092.

The previous prime is 21210231025969. The next prime is 21210231026161. The reversal of 21210231026093 is 39062013201212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20802474706729 + 407756319364 = 4560973^2 + 638558^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210231026093 - 2¹⁸ = 21210230763949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210231029093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605115513046 + 10605115513047.

It is an arithmetic number, because the mean of its divisors is an integer number (10605115513047).

Almost surely, 2^{21210231026093} is an apocalyptic number.

It is an amenable number.

21210231026093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210231026093 is an equidigital number, since it uses as much as digits as its factorization.

21210231026093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 21210231026093 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty-one million, twenty-six thousand, ninety-three".