1221002211022 has 16 divisors (see below), whose sum is σ = 2066900295600. Its totient is φ = 535863039040.

The previous prime is 1221002211017. The next prime is 1221002211031. The reversal of 1221002211022 is 2201122001221.

It is a happy number.

It is a super-2 number, since 2×1221002211022² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221002210987 and 1221002211005.

It is a congruent number.

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, 956897647 + ... + 956898922.

It is an arithmetic number, because the mean of its divisors is an integer number (129181268475).

Almost surely, 2^{1221002211022} is an apocalyptic number.

1221002211022 is a deficient number, since it is larger than the sum of its proper divisors (845898084578).

1221002211022 is a wasteful number, since it uses less digits than its factorization.

1221002211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913796611.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221002211022 its reverse (2201122001221), we get a palindrome (3422124212243).

The spelling of 1221002211022 in words is "one trillion, two hundred twenty-one billion, two million, two hundred eleven thousand, twenty-two".