121406377 has 2 divisors, whose sum is σ = 121406378. Its totient is φ = 121406376.

The previous prime is 121406357. The next prime is 121406381. The reversal of 121406377 is 773604121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97239321 + 24167056 = 9861^2 + 4916^2 .

It is an emirp because it is prime and its reverse (773604121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121406377 is a prime.

It is a super-2 number, since 2×121406377² = 29479016752532258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121406357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60703188 + 60703189.

It is an arithmetic number, because the mean of its divisors is an integer number (60703189).

Almost surely, 2^121406377 is an apocalyptic number.

It is an amenable number.

121406377 is a deficient number, since it is larger than the sum of its proper divisors (1).

121406377 is an equidigital number, since it uses as much as digits as its factorization.

121406377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 121406377 is about 11018.4561985788. The cubic root of 121406377 is about 495.1618380455.

The spelling of 121406377 in words is "one hundred twenty-one million, four hundred six thousand, three hundred seventy-seven".