21101220022231 has 8 divisors (see below), whose sum is σ = 21126261473280. Its totient is φ = 21076179939672.

The previous prime is 21101220022199. The next prime is 21101220022237. The reversal of 21101220022231 is 13222002210112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21101220022231 - 2⁵ = 21101220022199 is a prime.

It is a super-2 number, since 2×21101220022231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101220022199 and 21101220022208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101220022237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32366826 + ... + 33012328.

It is an arithmetic number, because the mean of its divisors is an integer number (2640782684160).

Almost surely, 2^{21101220022231} is an apocalyptic number.

21101220022231 is a deficient number, since it is larger than the sum of its proper divisors (25041451049).

21101220022231 is an equidigital number, since it uses as much as digits as its factorization.

21101220022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684245.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21101220022231 its reverse (13222002210112), we get a palindrome (34323222232343).

The spelling of 21101220022231 in words is "twenty-one trillion, one hundred one billion, two hundred twenty million, twenty-two thousand, two hundred thirty-one".