1221023100122 has 12 divisors (see below), whose sum is σ = 2130560715690. Its totient is φ = 523295614296.

The previous prime is 1221023100103. The next prime is 1221023100137. The reversal of 1221023100122 is 2210013201221.

It can be written as a sum of positive squares in only one way, i.e., 751031957641 + 469991142481 = 866621^2 + 685559^2 .

It is a super-2 number, since 2×1221023100122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221023100122.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6229709597 + ... + 6229709792.

Almost surely, 2^{1221023100122} is an apocalyptic number.

1221023100122 is a deficient number, since it is larger than the sum of its proper divisors (909537615568).

1221023100122 is a wasteful number, since it uses less digits than its factorization.

1221023100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12459419405 (or 12459419398 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221023100122 its reverse (2210013201221), we get a palindrome (3431036301343).

The spelling of 1221023100122 in words is "one trillion, two hundred twenty-one billion, twenty-three million, one hundred thousand, one hundred twenty-two".