121421002105 has 16 divisors (see below), whose sum is σ = 160562445120. Its totient is φ = 87579511488.

The previous prime is 121421002099. The next prime is 121421002139. The reversal of 121421002105 is 501200124121.

It is a cyclic number.

It is not a de Polignac number, because 121421002105 - 2³ = 121421002097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21718315 + ... + 21723904.

It is an arithmetic number, because the mean of its divisors is an integer number (10035152820).

Almost surely, 2^121421002105 is an apocalyptic number.

It is an amenable number.

121421002105 is a deficient number, since it is larger than the sum of its proper divisors (39141443015).

121421002105 is a wasteful number, since it uses less digits than its factorization.

121421002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43442280.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 121421002105 its reverse (501200124121), we get a palindrome (622621126226).

The spelling of 121421002105 in words is "one hundred twenty-one billion, four hundred twenty-one million, two thousand, one hundred five".