121907210 has 16 divisors (see below), whose sum is σ = 219561192. Its totient is φ = 48734400.

The previous prime is 121907209. The next prime is 121907251. The reversal of 121907210 is 12709121.

It can be written as a sum of positive squares in 4 ways, for example, as 119749249 + 2157961 = 10943^2 + 1469^2 .

It is a super-2 number, since 2×121907210² = 29722735699968200, which contains 22 as substring.

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, 26480 + ... + 30740.

Almost surely, 2^121907210 is an apocalyptic number.

121907210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121907210 is a deficient number, since it is larger than the sum of its proper divisors (97653982).

121907210 is a wasteful number, since it uses less digits than its factorization.

121907210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 121907210 is about 11041.1598122661. The cubic root of 121907210 is about 495.8417945186.

The spelling of 121907210 in words is "one hundred twenty-one million, nine hundred seven thousand, two hundred ten".