121492321 has 4 divisors (see below), whose sum is σ = 124077312. Its totient is φ = 118907332.

The previous prime is 121492291. The next prime is 121492331. The reversal of 121492321 is 123294121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123294121 = 479 ⋅257399.

It is a cyclic number.

It is not a de Polignac number, because 121492321 - 2¹¹ = 121490273 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121492331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292425 + ... + 1292518.

It is an arithmetic number, because the mean of its divisors is an integer number (31019328).

Almost surely, 2^121492321 is an apocalyptic number.

It is an amenable number.

121492321 is a deficient number, since it is larger than the sum of its proper divisors (2584991).

121492321 is an equidigital number, since it uses as much as digits as its factorization.

121492321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584990.

The product of its digits is 864, while the sum is 25.

The square root of 121492321 is about 11022.3555105068. The cubic root of 121492321 is about 495.2786527525.

The spelling of 121492321 in words is "one hundred twenty-one million, four hundred ninety-two thousand, three hundred twenty-one".