121071618 has 32 divisors (see below), whose sum is σ = 269680320. Its totient is φ = 40262400.

The previous prime is 121071593. The next prime is 121071619. The reversal of 121071618 is 816170121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 121071591 and 121071600.

It is not an unprimeable number, because it can be changed into a prime (121071619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22818 + ... + 27618.

It is an arithmetic number, because the mean of its divisors is an integer number (8427510).

Almost surely, 2^121071618 is an apocalyptic number.

121071618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121071618 is an abundant number, since it is smaller than the sum of its proper divisors (148608702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121071618 is a wasteful number, since it uses less digits than its factorization.

121071618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5279 (or 5273 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 121071618 is about 11003.2548820792. The cubic root of 121071618 is about 494.7063087948.

The spelling of 121071618 in words is "one hundred twenty-one million, seventy-one thousand, six hundred eighteen".