1221201102122 has 8 divisors (see below), whose sum is σ = 1852383694500. Its totient is φ = 603739870624.

The previous prime is 1221201102119. The next prime is 1221201102179. The reversal of 1221201102122 is 2212011021221.

It can be written as a sum of positive squares in 2 ways, for example, as 1112605149601 + 108595952521 = 1054801^2 + 329539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1221201102122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3430339997 + ... + 3430340352.

Almost surely, 2^{1221201102122} is an apocalyptic number.

1221201102122 is a deficient number, since it is larger than the sum of its proper divisors (631182592378).

1221201102122 is an equidigital number, since it uses as much as digits as its factorization.

1221201102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860680440.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221201102122 its reverse (2212011021221), we get a palindrome (3433212123343).

The spelling of 1221201102122 in words is "one trillion, two hundred twenty-one billion, two hundred one million, one hundred two thousand, one hundred twenty-two".