121730352287 has 4 divisors (see below), whose sum is σ = 122342062800. Its totient is φ = 121118641776.

The previous prime is 121730352257. The next prime is 121730352383. The reversal of 121730352287 is 782253037121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121730352287 - 2¹² = 121730348191 is a prime.

It is a super-2 number, since 2×121730352287² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121730352257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305854958 + ... + 305855355.

It is an arithmetic number, because the mean of its divisors is an integer number (30585515700).

Almost surely, 2^121730352287 is an apocalyptic number.

121730352287 is a deficient number, since it is larger than the sum of its proper divisors (611710513).

121730352287 is an equidigital number, since it uses as much as digits as its factorization.

121730352287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611710512.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 121730352287 in words is "one hundred twenty-one billion, seven hundred thirty million, three hundred fifty-two thousand, two hundred eighty-seven".