121226261 has 8 divisors (see below), whose sum is σ = 136227840. Its totient is φ = 107035632.

The previous prime is 121226243. The next prime is 121226263. The reversal of 121226261 is 162622121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121226261 - 2¹⁴ = 121209877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121226263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202421 + ... + 203018.

It is an arithmetic number, because the mean of its divisors is an integer number (17028480).

Almost surely, 2^121226261 is an apocalyptic number.

It is an amenable number.

121226261 is a deficient number, since it is larger than the sum of its proper divisors (15001579).

121226261 is a wasteful number, since it uses less digits than its factorization.

121226261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405475.

The product of its digits is 576, while the sum is 23.

The square root of 121226261 is about 11010.2797875440. The cubic root of 121226261 is about 494.9168462163.

Adding to 121226261 its reverse (162622121), we get a palindrome (283848382).

The spelling of 121226261 in words is "one hundred twenty-one million, two hundred twenty-six thousand, two hundred sixty-one".