121212010 has 16 divisors (see below), whose sum is σ = 218513376. Its totient is φ = 48411088.

The previous prime is 121211999. The next prime is 121212017. The reversal of 121212010 is 10212121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (121212017) 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, 2044 + ... + 15703.

It is an arithmetic number, because the mean of its divisors is an integer number (13657086).

Almost surely, 2^121212010 is an apocalyptic number.

121212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212010 is a deficient number, since it is larger than the sum of its proper divisors (97301366).

121212010 is a wasteful number, since it uses less digits than its factorization.

121212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18437.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121212010 is about 11009.6326005912. The cubic root of 121212010 is about 494.8974518037.

Adding to 121212010 its reverse (10212121), we get a palindrome (131424131).

The spelling of 121212010 in words is "one hundred twenty-one million, two hundred twelve thousand, ten".