121021311010 has 16 divisors (see below), whose sum is σ = 218266342200. Its totient is φ = 48313417216.

The previous prime is 121021311007. The next prime is 121021311049. The reversal of 121021311010 is 10113120121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 94163673321 + 26857637689 = 306861^2 + 163883^2 .

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 7 ways as a sum of consecutive naturals, for example, 11883055 + ... + 11893234.

Almost surely, 2^121021311010 is an apocalyptic number.

121021311010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021311010 is a deficient number, since it is larger than the sum of its proper divisors (97245031190).

121021311010 is a wasteful number, since it uses less digits than its factorization.

121021311010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23776805.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121021311010 its reverse (10113120121), we get a palindrome (131134431131).

The spelling of 121021311010 in words is "one hundred twenty-one billion, twenty-one million, three hundred eleven thousand, ten".