121202623 has 2 divisors, whose sum is σ = 121202624. Its totient is φ = 121202622.

The previous prime is 121202597. The next prime is 121202647. The reversal of 121202623 is 326202121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121202623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121202623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121202693) 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 as a sum of consecutive naturals, namely, 60601311 + 60601312.

It is an arithmetic number, because the mean of its divisors is an integer number (60601312).

Almost surely, 2^121202623 is an apocalyptic number.

121202623 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202623 is an equidigital number, since it uses as much as digits as its factorization.

121202623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 121202623 is about 11009.2062838335. The cubic root of 121202623 is about 494.8846760557.

Adding to 121202623 its reverse (326202121), we get a palindrome (447404744).

The spelling of 121202623 in words is "one hundred twenty-one million, two hundred two thousand, six hundred twenty-three".