121100201010 has 80 divisors (see below), whose sum is σ = 342763185600. Its totient is φ = 30593731104.

The previous prime is 121100201003. The next prime is 121100201039. The reversal of 121100201010 is 10102001121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121100200983 and 121100201001.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3918990 + ... + 3949769.

It is an arithmetic number, because the mean of its divisors is an integer number (4284539820).

Almost surely, 2^121100201010 is an apocalyptic number.

121100201010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121100201010 is an abundant number, since it is smaller than the sum of its proper divisors (221662984590).

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

121100201010 is a wasteful number, since it uses less digits than its factorization.

121100201010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868797 (or 7868788 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121100201010 its reverse (10102001121), we get a palindrome (131202202131).

The spelling of 121100201010 in words is "one hundred twenty-one billion, one hundred million, two hundred one thousand, ten".