121121200010 has 16 divisors (see below), whose sum is σ = 223335676872. Its totient is φ = 47266809600.

The previous prime is 121121199989. The next prime is 121121200037. The reversal of 121121200010 is 10002121121.

It can be written as a sum of positive squares in 4 ways, for example, as 81289422769 + 39831777241 = 285113^2 + 199579^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121121199964 and 121121200000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147708371 + ... + 147709190.

Almost surely, 2^121121200010 is an apocalyptic number.

121121200010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121200010 is a deficient number, since it is larger than the sum of its proper divisors (102214476862).

121121200010 is a wasteful number, since it uses less digits than its factorization.

121121200010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295417609.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121121200010 its reverse (10002121121), we get a palindrome (131123321131).

The spelling of 121121200010 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred thousand, ten".