1221101200102 has 32 divisors (see below), whose sum is σ = 2130334452288. Its totient is φ = 514153322496.

The previous prime is 1221101200091. The next prime is 1221101200127. The reversal of 1221101200102 is 2010021011221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3095673 + ... + 3467764.

It is an arithmetic number, because the mean of its divisors is an integer number (66572951634).

Almost surely, 2^{1221101200102} is an apocalyptic number.

1221101200102 is a deficient number, since it is larger than the sum of its proper divisors (909233252186).

1221101200102 is a wasteful number, since it uses less digits than its factorization.

1221101200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563680.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221101200102 its reverse (2010021011221), we get a palindrome (3231122211323).

The spelling of 1221101200102 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two hundred thousand, one hundred two".