21320012233229 has 2 divisors, whose sum is σ = 21320012233230. Its totient is φ = 21320012233228.

The previous prime is 21320012233213. The next prime is 21320012233243. The reversal of 21320012233229 is 92233221002312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19690279141129 + 1629733092100 = 4437373^2 + 1276610^2 .

It is a cyclic number.

It is not a de Polignac number, because 21320012233229 - 2⁴ = 21320012233213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320012233195 and 21320012233204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21320012233249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660006116614 + 10660006116615.

It is an arithmetic number, because the mean of its divisors is an integer number (10660006116615).

Almost surely, 2^{21320012233229} is an apocalyptic number.

It is an amenable number.

21320012233229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320012233229 is an equidigital number, since it uses as much as digits as its factorization.

21320012233229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 21320012233229 in words is "twenty-one trillion, three hundred twenty billion, twelve million, two hundred thirty-three thousand, two hundred twenty-nine".