121372723 has 2 divisors, whose sum is σ = 121372724. Its totient is φ = 121372722.

The previous prime is 121372721. The next prime is 121372733. The reversal of 121372723 is 327273121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121372723 - 2¹ = 121372721 is a prime.

Together with 121372721, it forms a pair of twin primes.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121372691 and 121372700.

It is not a weakly prime, because it can be changed into another prime (121372721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60686361 + 60686362.

It is an arithmetic number, because the mean of its divisors is an integer number (60686362).

Almost surely, 2^121372723 is an apocalyptic number.

121372723 is a deficient number, since it is larger than the sum of its proper divisors (1).

121372723 is an equidigital number, since it uses as much as digits as its factorization.

121372723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 121372723 is about 11016.9289277911. The cubic root of 121372723 is about 495.1160806564.

The spelling of 121372723 in words is "one hundred twenty-one million, three hundred seventy-two thousand, seven hundred twenty-three".