1221201102102 has 16 divisors (see below), whose sum is σ = 2454800187312. Its totient is φ = 405000703520.

The previous prime is 1221201102083. The next prime is 1221201102103. The reversal of 1221201102102 is 2012011021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221201102103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516581349 + ... + 516583712.

It is an arithmetic number, because the mean of its divisors is an integer number (153425011707).

Almost surely, 2^{1221201102102} is an apocalyptic number.

1221201102102 is an abundant number, since it is smaller than the sum of its proper divisors (1233599085210).

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

1221201102102 is a wasteful number, since it uses less digits than its factorization.

1221201102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033165263.

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

Adding to 1221201102102 its reverse (2012011021221), we get a palindrome (3233212123323).

The spelling of 1221201102102 in words is "one trillion, two hundred twenty-one billion, two hundred one million, one hundred two thousand, one hundred two".