121389610 has 16 divisors (see below), whose sum is σ = 222624936. Its totient is φ = 47639488.

The previous prime is 121389589. The next prime is 121389629. The reversal of 121389610 is 16983121.

It can be written as a sum of positive squares in 4 ways, for example, as 117223929 + 4165681 = 10827^2 + 2041^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113989 + ... + 115048.

Almost surely, 2^121389610 is an apocalyptic number.

121389610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121389610 is a deficient number, since it is larger than the sum of its proper divisors (101235326).

121389610 is a wasteful number, since it uses less digits than its factorization.

121389610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229097.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 121389610 is about 11017.6953125415. The cubic root of 121389610 is about 495.1390419866.

The spelling of 121389610 in words is "one hundred twenty-one million, three hundred eighty-nine thousand, six hundred ten".