121204810 has 16 divisors (see below), whose sum is σ = 221242752. Its totient is φ = 47798800.

The previous prime is 121204793. The next prime is 121204813. The reversal of 121204810 is 18402121.

It is a happy number.

It is a super-2 number, since 2×121204810² = 29381211934272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121204813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84646 + ... + 86065.

It is an arithmetic number, because the mean of its divisors is an integer number (13827672).

Almost surely, 2^121204810 is an apocalyptic number.

121204810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121204810 is a deficient number, since it is larger than the sum of its proper divisors (100037942).

121204810 is a wasteful number, since it uses less digits than its factorization.

121204810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170789.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 121204810 is about 11009.3056093470. The cubic root of 121204810 is about 494.8876526312.

Adding to 121204810 its reverse (18402121), we get a palindrome (139606931).

The spelling of 121204810 in words is "one hundred twenty-one million, two hundred four thousand, eight hundred ten".