1221210110122 has 16 divisors (see below), whose sum is σ = 1876726812744. Its totient is φ = 595638208000.

The previous prime is 1221210110101. The next prime is 1221210110207. The reversal of 1221210110122 is 2210110121221.

It can be written as a sum of positive squares in 4 ways, for example, as 450991490481 + 770218619641 = 671559^2 + 877621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221210110096 and 1221210110105.

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, 258829 + ... + 1584112.

Almost surely, 2^{1221210110122} is an apocalyptic number.

1221210110122 is a deficient number, since it is larger than the sum of its proper divisors (655516702622).

1221210110122 is a wasteful number, since it uses less digits than its factorization.

1221210110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851065.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221210110122 its reverse (2210110121221), we get a palindrome (3431320231343).

The spelling of 1221210110122 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, one hundred ten thousand, one hundred twenty-two".