121421277 has 12 divisors (see below), whose sum is σ = 175553404. Its totient is φ = 80870400.

The previous prime is 121421273. The next prime is 121421297. The reversal of 121421277 is 772124121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 95472441 + 25948836 = 9771^2 + 5094^2 .

It is not a de Polignac number, because 121421277 - 2² = 121421273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121421277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121421273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4527 + ... + 16227.

Almost surely, 2^121421277 is an apocalyptic number.

It is an amenable number.

121421277 is a deficient number, since it is larger than the sum of its proper divisors (54132127).

121421277 is a wasteful number, since it uses less digits than its factorization.

121421277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860 (or 12857 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 121421277 is about 11019.1323161127. The cubic root of 121421277 is about 495.1820940094.

Adding to 121421277 its reverse (772124121), we get a palindrome (893545398).

The spelling of 121421277 in words is "one hundred twenty-one million, four hundred twenty-one thousand, two hundred seventy-seven".