21653053126231 has 2 divisors, whose sum is σ = 21653053126232. Its totient is φ = 21653053126230.

The previous prime is 21653053126223. The next prime is 21653053126267. The reversal of 21653053126231 is 13262135035612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21653053126231 - 2³ = 21653053126223 is a prime.

It is a super-2 number, since 2×21653053126231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21653053126031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826526563115 + 10826526563116.

It is an arithmetic number, because the mean of its divisors is an integer number (10826526563116).

Almost surely, 2^{21653053126231} is an apocalyptic number.

21653053126231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21653053126231 is an equidigital number, since it uses as much as digits as its factorization.

21653053126231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 21653053126231 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-three million, one hundred twenty-six thousand, two hundred thirty-one".