121434021 has 12 divisors (see below), whose sum is σ = 179484448. Its totient is φ = 79073064.

The previous prime is 121434011. The next prime is 121434023. The reversal of 121434021 is 120434121.

It is not a de Polignac number, because 121434021 - 2⁵ = 121433989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121433985 and 121434003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121434023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156505 + ... + 157278.

Almost surely, 2^121434021 is an apocalyptic number.

It is an amenable number.

121434021 is a deficient number, since it is larger than the sum of its proper divisors (58050427).

121434021 is a wasteful number, since it uses less digits than its factorization.

121434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313832 (or 313829 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121434021 is about 11019.7105678870. The cubic root of 121434021 is about 495.1994176614.

Adding to 121434021 its reverse (120434121), we get a palindrome (241868142).

The spelling of 121434021 in words is "one hundred twenty-one million, four hundred thirty-four thousand, twenty-one".