1221101102102 has 32 divisors (see below), whose sum is σ = 2204117153280. Its totient is φ = 495644460480.

The previous prime is 1221101102101. The next prime is 1221101102119. The reversal of 1221101102102 is 2012011011221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287402 + ... + 1588962.

It is an arithmetic number, because the mean of its divisors is an integer number (68878661040).

Almost surely, 2^{1221101102102} is an apocalyptic number.

1221101102102 is a deficient number, since it is larger than the sum of its proper divisors (983016051178).

1221101102102 is a wasteful number, since it uses less digits than its factorization.

1221101102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305116.

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

Adding to 1221101102102 its reverse (2012011011221), we get a palindrome (3233112113323).

The spelling of 1221101102102 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred two thousand, one hundred two".