21222235062503 has 4 divisors (see below), whose sum is σ = 21222256042680. Its totient is φ = 21222214082328.

The previous prime is 21222235062499. The next prime is 21222235062521. The reversal of 21222235062503 is 30526053222212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21222235062503 - 2² = 21222235062499 is a prime.

It is a super-2 number, since 2×21222235062503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222235062593) 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, 8891588 + ... + 11022921.

It is an arithmetic number, because the mean of its divisors is an integer number (5305564010670).

Almost surely, 2^{21222235062503} is an apocalyptic number.

21222235062503 is a deficient number, since it is larger than the sum of its proper divisors (20980177).

21222235062503 is a wasteful number, since it uses less digits than its factorization.

21222235062503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20980176.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21222235062503 its reverse (30526053222212), we get a palindrome (51748288284715).

The spelling of 21222235062503 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirty-five million, sixty-two thousand, five hundred three".