1221202112222 has 32 divisors (see below), whose sum is σ = 1959271434144. Its totient is φ = 568844800000.

The previous prime is 1221202112219. The next prime is 1221202112267. The reversal of 1221202112222 is 2222112021221.

It is a junction number, because it is equal to n+sod(n) for n = 1221202112194 and 1221202112203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13694993 + ... + 13783875.

It is an arithmetic number, because the mean of its divisors is an integer number (61227232317).

Almost surely, 2^{1221202112222} is an apocalyptic number.

1221202112222 is a deficient number, since it is larger than the sum of its proper divisors (738069321922).

1221202112222 is a wasteful number, since it uses less digits than its factorization.

1221202112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93004.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221202112222 its reverse (2222112021221), we get a palindrome (3443314133443).

The spelling of 1221202112222 in words is "one trillion, two hundred twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred twenty-two".