1221000022102 has 96 divisors (see below), whose sum is σ = 2322447033600. Its totient is φ = 478142021952.

The previous prime is 1221000022091. The next prime is 1221000022153. The reversal of 1221000022102 is 2012200001221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 53068533 + ... + 53091535.

It is an arithmetic number, because the mean of its divisors is an integer number (24192156600).

Almost surely, 2^{1221000022102} is an apocalyptic number.

1221000022102 is a deficient number, since it is larger than the sum of its proper divisors (1101447011498).

1221000022102 is a wasteful number, since it uses less digits than its factorization.

1221000022102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24050 (or 24043 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1221000022102 its reverse (2012200001221), we get a palindrome (3233200023323).

The spelling of 1221000022102 in words is "one trillion, two hundred twenty-one billion, twenty-two thousand, one hundred two".