1221101002102 has 4 divisors (see below), whose sum is σ = 1831651503156. Its totient is φ = 610550501050.

The previous prime is 1221101002063. The next prime is 1221101002271. The reversal of 1221101002102 is 2012001011221.

It is a semiprime because it is the product of two primes.

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, 305275250524 + ... + 305275250527.

It is an arithmetic number, because the mean of its divisors is an integer number (457912875789).

Almost surely, 2^{1221101002102} is an apocalyptic number.

1221101002102 is a deficient number, since it is larger than the sum of its proper divisors (610550501054).

1221101002102 is an equidigital number, since it uses as much as digits as its factorization.

1221101002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610550501053.

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

Adding to 1221101002102 its reverse (2012001011221), we get a palindrome (3233102013323).

The spelling of 1221101002102 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two thousand, one hundred two".