221202211122 has 32 divisors (see below), whose sum is σ = 517432075200. Its totient is φ = 69853329504.

The previous prime is 221202211099. The next prime is 221202211147. The reversal of 221202211122 is 221112202122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221202211095 and 221202211104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107797323 + ... + 107799374.

It is an arithmetic number, because the mean of its divisors is an integer number (16169752350).

Almost surely, 2^221202211122 is an apocalyptic number.

221202211122 is an abundant number, since it is smaller than the sum of its proper divisors (296229864078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221202211122 is a wasteful number, since it uses less digits than its factorization.

221202211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215596727 (or 215596721 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221202211122 its reverse (221112202122), we get a palindrome (442314413244).

The spelling of 221202211122 in words is "two hundred twenty-one billion, two hundred two million, two hundred eleven thousand, one hundred twenty-two".