121421002104 has 64 divisors (see below), whose sum is σ = 337331556000. Its totient is φ = 40467548160.

The previous prime is 121421002099. The next prime is 121421002139. The reversal of 121421002104 is 401200124121.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 15 ways as a sum of consecutive naturals, for example, 1522584 + ... + 1600344.

Almost surely, 2^121421002104 is an apocalyptic number.

It is an amenable number.

121421002104 is an abundant number, since it is smaller than the sum of its proper divisors (215910553896).

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

121421002104 is a wasteful number, since it uses less digits than its factorization.

121421002104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85005 (or 84995 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121421002104 its reverse (401200124121), we get a palindrome (522621126225).

The spelling of 121421002104 in words is "one hundred twenty-one billion, four hundred twenty-one million, two thousand, one hundred four".