121202231 has 4 divisors (see below), whose sum is σ = 128331792. Its totient is φ = 114072672.

The previous prime is 121202209. The next prime is 121202239. The reversal of 121202231 is 132202121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132202121 = 1063 ⋅124367.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121202231 is a prime.

It is a super-2 number, since 2×121202231² = 29379961598754722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202239) 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, 3564755 + ... + 3564788.

It is an arithmetic number, because the mean of its divisors is an integer number (32082948).

Almost surely, 2^121202231 is an apocalyptic number.

121202231 is a deficient number, since it is larger than the sum of its proper divisors (7129561).

121202231 is an equidigital number, since it uses as much as digits as its factorization.

121202231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129560.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121202231 is about 11009.1884805375. The cubic root of 121202231 is about 494.8841425276.

Adding to 121202231 its reverse (132202121), we get a palindrome (253404352).

The spelling of 121202231 in words is "one hundred twenty-one million, two hundred two thousand, two hundred thirty-one".