121421013 has 16 divisors (see below), whose sum is σ = 190024320. Its totient is φ = 67507776.

The previous prime is 121420993. The next prime is 121421023. The reversal of 121421013 is 310124121.

It is not a de Polignac number, because 121421013 - 2⁸ = 121420757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121420983 and 121421001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121421023) 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 15 ways as a sum of consecutive naturals, for example, 77358 + ... + 78911.

It is an arithmetic number, because the mean of its divisors is an integer number (11876520).

Almost surely, 2^121421013 is an apocalyptic number.

It is an amenable number.

121421013 is a deficient number, since it is larger than the sum of its proper divisors (68603307).

121421013 is a wasteful number, since it uses less digits than its factorization.

121421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156316.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121421013 is about 11019.1203369416. The cubic root of 121421013 is about 495.1817351263.

Adding to 121421013 its reverse (310124121), we get a palindrome (431545134).

The spelling of 121421013 in words is "one hundred twenty-one million, four hundred twenty-one thousand, thirteen".