121220121010 has 16 divisors (see below), whose sum is σ = 218206426176. Its totient is φ = 48485779888.

The previous prime is 121220121007. The next prime is 121220121047. The reversal of 121220121010 is 10121022121.

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, 49972 + ... + 494911.

It is an arithmetic number, because the mean of its divisors is an integer number (13637901636).

Almost surely, 2^121220121010 is an apocalyptic number.

121220121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220121010 is a deficient number, since it is larger than the sum of its proper divisors (96986305166).

121220121010 is a wasteful number, since it uses less digits than its factorization.

121220121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567137.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121220121010 its reverse (10121022121), we get a palindrome (131341143131).

The spelling of 121220121010 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, ten".