111222202022221 has 4 divisors (see below), whose sum is σ = 111228187199392. Its totient is φ = 111216216845052.

The previous prime is 111222202022203. The next prime is 111222202022237. The reversal of 111222202022221 is 122220202222111.

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 111222202022221 - 2²¹ = 111222199925069 is a prime.

It is a super-2 number, since 2×111222202022221² (a number of 29 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 = 111222202022192 and 111222202022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222202022021) 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, 2992560711 + ... + 2992597876.

It is an arithmetic number, because the mean of its divisors is an integer number (27807046799848).

Almost surely, 2^{111222202022221} is an apocalyptic number.

It is an amenable number.

111222202022221 is a deficient number, since it is larger than the sum of its proper divisors (5985177171).

111222202022221 is an equidigital number, since it uses as much as digits as its factorization.

111222202022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5985177170.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 111222202022221 its reverse (122220202222111), we get a palindrome (233442404244332).

It can be divided in two parts, 11 and 1222202022221, that multiplied together give a palindrome (13444222244431).

The spelling of 111222202022221 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred two million, twenty-two thousand, two hundred twenty-one".