1221102102000 has 160 divisors (see below), whose sum is σ = 4294727334144. Its totient is φ = 296024736000.

The previous prime is 1221102101971. The next prime is 1221102102013. The reversal of 1221102102000 is 2012011221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9184774 + ... + 9316773.

Almost surely, 2^{1221102102000} is an apocalyptic number.

1221102102000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221102102000 is an abundant number, since it is smaller than the sum of its proper divisors (3073625232144).

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

1221102102000 is a wasteful number, since it uses less digits than its factorization.

1221102102000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18501584 (or 18501568 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1221102102000 its reverse (2012011221), we get a palindrome (1223114113221).

The spelling of 1221102102000 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred two thousand".