1221202221122 has 32 divisors (see below), whose sum is σ = 2088194834880. Its totient is φ = 531540475200.

The previous prime is 1221202221103. The next prime is 1221202221143. The reversal of 1221202221122 is 2211222021221.

It is a junction number, because it is equal to n+sod(n) for n = 1221202221094 and 1221202221103.

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, 18800504 + ... + 18865347.

It is an arithmetic number, because the mean of its divisors is an integer number (65256088590).

Almost surely, 2^{1221202221122} is an apocalyptic number.

1221202221122 is a deficient number, since it is larger than the sum of its proper divisors (866992613758).

1221202221122 is a wasteful number, since it uses less digits than its factorization.

1221202221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37665938.

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

Adding to 1221202221122 its reverse (2211222021221), we get a palindrome (3432424242343).

The spelling of 1221202221122 in words is "one trillion, two hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-two".