21121883093 has 2 divisors, whose sum is σ = 21121883094. Its totient is φ = 21121883092.

The previous prime is 21121883071. The next prime is 21121883099. The reversal of 21121883093 is 39038812112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20960669284 + 161213809 = 144778^2 + 12697^2 .

It is a cyclic number.

It is not a de Polignac number, because 21121883093 - 2¹² = 21121878997 is a prime.

It is a super-2 number, since 2×21121883093² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121883099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560941546 + 10560941547.

It is an arithmetic number, because the mean of its divisors is an integer number (10560941547).

Almost surely, 2^21121883093 is an apocalyptic number.

It is an amenable number.

21121883093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121883093 is an equidigital number, since it uses as much as digits as its factorization.

21121883093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 21121883093 in words is "twenty-one billion, one hundred twenty-one million, eight hundred eighty-three thousand, ninety-three".