121234021 has 16 divisors (see below), whose sum is σ = 131281344. Its totient is φ = 111538944.

The previous prime is 121234013. The next prime is 121234027. The reversal of 121234021 is 120432121.

It is not a de Polignac number, because 121234021 - 2³ = 121234013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121233986 and 121234004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121234027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185331 + ... + 185983.

It is an arithmetic number, because the mean of its divisors is an integer number (8205084).

Almost surely, 2^121234021 is an apocalyptic number.

It is an amenable number.

121234021 is a deficient number, since it is larger than the sum of its proper divisors (10047323).

121234021 is a wasteful number, since it uses less digits than its factorization.

121234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121234021 is about 11010.6321798523. The cubic root of 121234021 is about 494.9274062846.

Adding to 121234021 its reverse (120432121), we get a palindrome (241666142).

The spelling of 121234021 in words is "one hundred twenty-one million, two hundred thirty-four thousand, twenty-one".