121421102 has 16 divisors (see below), whose sum is σ = 199522224. Its totient is φ = 54960000.

The previous prime is 121421101. The next prime is 121421107. The reversal of 121421102 is 201124121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121421101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6149 + ... + 16752.

It is an arithmetic number, because the mean of its divisors is an integer number (12470139).

Almost surely, 2^121421102 is an apocalyptic number.

121421102 is a deficient number, since it is larger than the sum of its proper divisors (78101122).

121421102 is a wasteful number, since it uses less digits than its factorization.

121421102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23155.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 121421102 is about 11019.1243753757. The cubic root of 121421102 is about 495.1818561134.

Adding to 121421102 its reverse (201124121), we get a palindrome (322545223).

The spelling of 121421102 in words is "one hundred twenty-one million, four hundred twenty-one thousand, one hundred two".