121213106 has 16 divisors (see below), whose sum is σ = 209121216. Its totient is φ = 51616656.

The previous prime is 121213063. The next prime is 121213129. The reversal of 121213106 is 601312121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25376 + ... + 29771.

It is an arithmetic number, because the mean of its divisors is an integer number (13070076).

Almost surely, 2^121213106 is an apocalyptic number.

121213106 is a deficient number, since it is larger than the sum of its proper divisors (87908110).

121213106 is a wasteful number, since it uses less digits than its factorization.

121213106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55313.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121213106 is about 11009.6823750733. The cubic root of 121213106 is about 494.8989434215.

Adding to 121213106 its reverse (601312121), we get a palindrome (722525227).

The spelling of 121213106 in words is "one hundred twenty-one million, two hundred thirteen thousand, one hundred six".