1221021021122 has 32 divisors (see below), whose sum is σ = 2132913347712. Its totient is φ = 513363337344.

The previous prime is 1221021021083. The next prime is 1221021021151. The reversal of 1221021021122 is 2211201201221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221021021122.

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, 6839933 + ... + 7016175.

It is an arithmetic number, because the mean of its divisors is an integer number (66653542116).

Almost surely, 2^{1221021021122} is an apocalyptic number.

1221021021122 is a deficient number, since it is larger than the sum of its proper divisors (911892326590).

1221021021122 is a wasteful number, since it uses less digits than its factorization.

1221021021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185642.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221021021122 its reverse (2211201201221), we get a palindrome (3432222222343).

The spelling of 1221021021122 in words is "one trillion, two hundred twenty-one billion, twenty-one million, twenty-one thousand, one hundred twenty-two".