1221001021122 has 16 divisors (see below), whose sum is σ = 2570528465760. Its totient is φ = 385579269792.

The previous prime is 1221001021087. The next prime is 1221001021147. The reversal of 1221001021122 is 2211201001221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5355267523 + ... + 5355267750.

It is an arithmetic number, because the mean of its divisors is an integer number (160658029110).

Almost surely, 2^{1221001021122} is an apocalyptic number.

1221001021122 is an abundant number, since it is smaller than the sum of its proper divisors (1349527444638).

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

1221001021122 is a wasteful number, since it uses less digits than its factorization.

1221001021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710535297.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221001021122 its reverse (2211201001221), we get a palindrome (3432202022343).

The spelling of 1221001021122 in words is "one trillion, two hundred twenty-one billion, one million, twenty-one thousand, one hundred twenty-two".