121234421 has 32 divisors (see below), whose sum is σ = 160358400. Its totient is φ = 88793280.

The previous prime is 121234411. The next prime is 121234433. The reversal of 121234421 is 124432121.

It is a cyclic number.

It is not a de Polignac number, because 121234421 - 2²⁶ = 54125557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121234393 and 121234402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121234411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252860 + ... + 253338.

It is an arithmetic number, because the mean of its divisors is an integer number (5011200).

Almost surely, 2^121234421 is an apocalyptic number.

121234421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121234421 is a deficient number, since it is larger than the sum of its proper divisors (39123979).

121234421 is a wasteful number, since it uses less digits than its factorization.

121234421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689.

The product of its digits is 384, while the sum is 20.

The square root of 121234421 is about 11010.6503440987. The cubic root of 121234421 is about 494.9279506058.

Adding to 121234421 its reverse (124432121), we get a palindrome (245666542).

The spelling of 121234421 in words is "one hundred twenty-one million, two hundred thirty-four thousand, four hundred twenty-one".