1221201111122 has 16 divisors (see below), whose sum is σ = 1838622537432. Its totient is φ = 608328988800.

The previous prime is 1221201111107. The next prime is 1221201111157. The reversal of 1221201111122 is 2211111021221.

It can be written as a sum of positive squares in 4 ways, for example, as 694257234841 + 526943876281 = 833221^2 + 725909^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1221201111122.

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, 676928 + ... + 1703124.

Almost surely, 2^{1221201111122} is an apocalyptic number.

1221201111122 is a deficient number, since it is larger than the sum of its proper divisors (617421426310).

1221201111122 is a wasteful number, since it uses less digits than its factorization.

1221201111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028413.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1221201111122 its reverse (2211111021221), we get a palindrome (3432312132343).

The spelling of 1221201111122 in words is "one trillion, two hundred twenty-one billion, two hundred one million, one hundred eleven thousand, one hundred twenty-two".