21263242032229 has 4 divisors (see below), whose sum is σ = 21306548024640. Its totient is φ = 21219936039820.

The previous prime is 21263242032211. The next prime is 21263242032233. The reversal of 21263242032229 is 92223024236212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21263242032229 - 2²³ = 21263233643621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21263242032191 and 21263242032200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21263242032629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21652995469 + ... + 21652996450.

It is an arithmetic number, because the mean of its divisors is an integer number (5326637006160).

Almost surely, 2^{21263242032229} is an apocalyptic number.

It is an amenable number.

21263242032229 is a deficient number, since it is larger than the sum of its proper divisors (43305992411).

21263242032229 is an equidigital number, since it uses as much as digits as its factorization.

21263242032229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43305992410.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 21263242032229 in words is "twenty-one trillion, two hundred sixty-three billion, two hundred forty-two million, thirty-two thousand, two hundred twenty-nine".