121137830 has 16 divisors (see below), whose sum is σ = 237870864. Its totient is φ = 44050080.

The previous prime is 121137827. The next prime is 121137833. The reversal of 121137830 is 38731121.

It is an interprime number because it is at equal distance from previous prime (121137827) and next prime (121137833).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121137830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121137833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550517 + ... + 550736.

It is an arithmetic number, because the mean of its divisors is an integer number (14866929).

Almost surely, 2^121137830 is an apocalyptic number.

121137830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121137830 is a deficient number, since it is larger than the sum of its proper divisors (116733034).

121137830 is a wasteful number, since it uses less digits than its factorization.

121137830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101271.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 121137830 is about 11006.2632169143. The cubic root of 121137830 is about 494.7964745037.

Adding to 121137830 its reverse (38731121), we get a palindrome (159868951).

The spelling of 121137830 in words is "one hundred twenty-one million, one hundred thirty-seven thousand, eight hundred thirty".