1221001121022 has 32 divisors (see below), whose sum is σ = 2443311129600. Its totient is φ = 406782300288.

The previous prime is 1221001120987. The next prime is 1221001121059. The reversal of 1221001121022 is 2201211001221.

It is a junction number, because it is equal to n+sod(n) for n = 1221001120992 and 1221001121010.

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, 133628038 + ... + 133637174.

It is an arithmetic number, because the mean of its divisors is an integer number (76353472800).

Almost surely, 2^{1221001121022} is an apocalyptic number.

1221001121022 is an abundant number, since it is smaller than the sum of its proper divisors (1222310008578).

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

1221001121022 is a wasteful number, since it uses less digits than its factorization.

1221001121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18640.

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

Adding to 1221001121022 its reverse (2201211001221), we get a palindrome (3422212122243).

The spelling of 1221001121022 in words is "one trillion, two hundred twenty-one billion, one million, one hundred twenty-one thousand, twenty-two".