121851377 has 2 divisors, whose sum is σ = 121851378. Its totient is φ = 121851376.

The previous prime is 121851371. The next prime is 121851439. The reversal of 121851377 is 773158121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121793296 + 58081 = 11036^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 121851377 - 2¹⁰ = 121850353 is a prime.

It is a super-2 number, since 2×121851377² = 29695516153592258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121851371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60925688 + 60925689.

It is an arithmetic number, because the mean of its divisors is an integer number (60925689).

Almost surely, 2^121851377 is an apocalyptic number.

It is an amenable number.

121851377 is a deficient number, since it is larger than the sum of its proper divisors (1).

121851377 is an equidigital number, since it uses as much as digits as its factorization.

121851377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 35.

The square root of 121851377 is about 11038.6311198445. The cubic root of 121851377 is about 495.7660851261.

The spelling of 121851377 in words is "one hundred twenty-one million, eight hundred fifty-one thousand, three hundred seventy-seven".