121220203210 has 8 divisors (see below), whose sum is σ = 218196365796. Its totient is φ = 48488081280.

The previous prime is 121220203201. The next prime is 121220203211. The reversal of 121220203210 is 12302022121.

It is a happy number.

121220203210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 109667607921 + 11552595289 = 331161^2 + 107483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121220203211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6061010151 + ... + 6061010170.

Almost surely, 2^121220203210 is an apocalyptic number.

121220203210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220203210 is a deficient number, since it is larger than the sum of its proper divisors (96976162586).

121220203210 is a wasteful number, since it uses less digits than its factorization.

121220203210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12122020328.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 121220203210 its reverse (12302022121), we get a palindrome (133522225331).

The spelling of 121220203210 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred three thousand, two hundred ten".