121200110220 has 96 divisors (see below), whose sum is σ = 389789568000. Its totient is φ = 27563652864.

The previous prime is 121200110219. The next prime is 121200110347. The reversal of 121200110220 is 22011002121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121200110196 and 121200110205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641475 + ... + 808634.

It is an arithmetic number, because the mean of its divisors is an integer number (4060308000).

Almost surely, 2^121200110220 is an apocalyptic number.

121200110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200110220 is an abundant number, since it is smaller than the sum of its proper divisors (268589457780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121200110220 is a wasteful number, since it uses less digits than its factorization.

121200110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450327 (or 1450325 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121200110220 its reverse (22011002121), we get a palindrome (143211112341).

It can be divided in two parts, 1212001 and 10220, that added together give a palindrome (1222221).

The spelling of 121200110220 in words is "one hundred twenty-one billion, two hundred million, one hundred ten thousand, two hundred twenty".