222122987 has 4 divisors (see below), whose sum is σ = 226849056. Its totient is φ = 217396920.

The previous prime is 222122981. The next prime is 222123001. The reversal of 222122987 is 789221222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789221222 = 2 ⋅394610611.

It is a cyclic number.

It is not a de Polignac number, because 222122987 - 2¹² = 222118891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222122981) 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, 2362964 + ... + 2363057.

It is an arithmetic number, because the mean of its divisors is an integer number (56712264).

Almost surely, 2^222122987 is an apocalyptic number.

222122987 is a deficient number, since it is larger than the sum of its proper divisors (4726069).

222122987 is an equidigital number, since it uses as much as digits as its factorization.

222122987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726068.

The product of its digits is 16128, while the sum is 35.

The square root of 222122987 is about 14903.7910277889. The cubic root of 222122987 is about 605.6166896704.

The spelling of 222122987 in words is "two hundred twenty-two million, one hundred twenty-two thousand, nine hundred eighty-seven".