1221102110012 has 6 divisors (see below), whose sum is σ = 2136928692528. Its totient is φ = 610551055004.

The previous prime is 1221102109967. The next prime is 1221102110029. The reversal of 1221102110012 is 2100112011221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152637763748 + ... + 152637763755.

It is an arithmetic number, because the mean of its divisors is an integer number (356154782088).

Almost surely, 2^{1221102110012} is an apocalyptic number.

It is an amenable number.

1221102110012 is a deficient number, since it is larger than the sum of its proper divisors (915826582516).

1221102110012 is a wasteful number, since it uses less digits than its factorization.

1221102110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305275527507 (or 305275527505 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221102110012 its reverse (2100112011221), we get a palindrome (3321214121233).

The spelling of 1221102110012 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred ten thousand, twelve".