1221220102112 has 48 divisors (see below), whose sum is σ = 2406679327584. Its totient is φ = 610000320000.

The previous prime is 1221220102093. The next prime is 1221220102127. The reversal of 1221220102112 is 2112010221221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193503437 + ... + 193509747.

It is an arithmetic number, because the mean of its divisors is an integer number (50139152658).

Almost surely, 2^{1221220102112} is an apocalyptic number.

It is an amenable number.

1221220102112 is a deficient number, since it is larger than the sum of its proper divisors (1185459225472).

1221220102112 is a wasteful number, since it uses less digits than its factorization.

1221220102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11403 (or 11395 counting only the distinct ones).

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

Adding to 1221220102112 its reverse (2112010221221), we get a palindrome (3333230323333).

The spelling of 1221220102112 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred two thousand, one hundred twelve".