111222221002 has 4 divisors (see below), whose sum is σ = 166833331506. Its totient is φ = 55611110500.

The previous prime is 111222220987. The next prime is 111222221017. The reversal of 111222221002 is 200122222111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200122222111 = 7 ⋅28588888873.

It is an interprime number because it is at equal distance from previous prime (111222220987) and next prime (111222221017).

It can be written as a sum of positive squares in only one way, i.e., 102419840961 + 8802380041 = 320031^2 + 93821^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805555249 + ... + 27805555252.

Almost surely, 2^111222221002 is an apocalyptic number.

111222221002 is a deficient number, since it is larger than the sum of its proper divisors (55611110504).

111222221002 is an equidigital number, since it uses as much as digits as its factorization.

111222221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55611110503.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111222221002 its reverse (200122222111), we get a palindrome (311344443113).

The spelling of 111222221002 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, two".