121421110 has 32 divisors (see below), whose sum is σ = 229342464. Its totient is φ = 46224000.

The previous prime is 121421107. The next prime is 121421129. The reversal of 121421110 is 11124121.

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, 15700 + ... + 22120.

It is an arithmetic number, because the mean of its divisors is an integer number (7166952).

Almost surely, 2^121421110 is an apocalyptic number.

121421110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121421110 is a deficient number, since it is larger than the sum of its proper divisors (107921354).

121421110 is a wasteful number, since it uses less digits than its factorization.

121421110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6520.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 121421110 is about 11019.1247383810. The cubic root of 121421110 is about 495.1818669887.

Adding to 121421110 its reverse (11124121), we get a palindrome (132545231).

The spelling of 121421110 in words is "one hundred twenty-one million, four hundred twenty-one thousand, one hundred ten".