21202446220231 has 2 divisors, whose sum is σ = 21202446220232. Its totient is φ = 21202446220230.

The previous prime is 21202446220183. The next prime is 21202446220339. The reversal of 21202446220231 is 13202264420212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202446220231 - 2¹³ = 21202446212039 is a prime.

It is a super-2 number, since 2×21202446220231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202446220193 and 21202446220202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202446250231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601223110115 + 10601223110116.

It is an arithmetic number, because the mean of its divisors is an integer number (10601223110116).

Almost surely, 2^{21202446220231} is an apocalyptic number.

21202446220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202446220231 is an equidigital number, since it uses as much as digits as its factorization.

21202446220231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 21202446220231 in words is "twenty-one trillion, two hundred two billion, four hundred forty-six million, two hundred twenty thousand, two hundred thirty-one".