222121211985 has 40 divisors (see below), whose sum is σ = 398256764136. Its totient is φ = 118439677440.

The previous prime is 222121211971. The next prime is 222121212013. The reversal of 222121211985 is 589112121222.

It can be written as a sum of positive squares in 4 ways, for example, as 49021945281 + 173099266704 = 221409^2 + 416052^2 .

It is not a de Polignac number, because 222121211985 - 2⁵ = 222121211953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1952265 + ... + 2062905.

Almost surely, 2^222121211985 is an apocalyptic number.

It is an amenable number.

222121211985 is a deficient number, since it is larger than the sum of its proper divisors (176135552151).

222121211985 is a wasteful number, since it uses less digits than its factorization.

222121211985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115615 (or 115606 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The spelling of 222121211985 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, nine hundred eighty-five".