1221201100122 has 8 divisors (see below), whose sum is σ = 2442402200256. Its totient is φ = 407067033372.

The previous prime is 1221201100103. The next prime is 1221201100139. The reversal of 1221201100122 is 2210011021221.

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

1221201100122 is an admirable number.

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, 101766758338 + ... + 101766758349.

It is an arithmetic number, because the mean of its divisors is an integer number (305300275032).

Almost surely, 2^{1221201100122} is an apocalyptic number.

1221201100122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221201100122 is a wasteful number, since it uses less digits than its factorization.

1221201100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203533516692.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221201100122 its reverse (2210011021221), we get a palindrome (3431212121343).

The spelling of 1221201100122 in words is "one trillion, two hundred twenty-one billion, two hundred one million, one hundred thousand, one hundred twenty-two".