222111102120021 has 12 divisors (see below), whose sum is σ = 320960881238400. Its totient is φ = 148012344819240.

The previous prime is 222111102119983. The next prime is 222111102120059. The reversal of 222111102120021 is 120021201111222.

It is an interprime number because it is at equal distance from previous prime (222111102119983) and next prime (222111102120059).

It is not a de Polignac number, because 222111102120021 - 2¹⁷ = 222111101988949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222111102119976 and 222111102120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111102120221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5143582275 + ... + 5143625456.

It is an arithmetic number, because the mean of its divisors is an integer number (26746740103200).

Almost surely, 2^{222111102120021} is an apocalyptic number.

It is an amenable number.

222111102120021 is a deficient number, since it is larger than the sum of its proper divisors (98849779118379).

222111102120021 is a wasteful number, since it uses less digits than its factorization.

222111102120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287210136 (or 10287210133 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222111102120021 its reverse (120021201111222), we get a palindrome (342132303231243).

The spelling of 222111102120021 in words is "two hundred twenty-two trillion, one hundred eleven billion, one hundred two million, one hundred twenty thousand, twenty-one".