100121201221010 has 32 divisors (see below), whose sum is σ = 182423704532400. Its totient is φ = 39559251916800.

The previous prime is 100121201221007. The next prime is 100121201221037. The reversal of 100121201221010 is 10122102121001.

It can be written as a sum of positive squares in 8 ways, for example, as 622112365081 + 99499088855929 = 788741^2 + 9974923^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54848141 + ... + 56644160.

Almost surely, 2^{100121201221010} is an apocalyptic number.

100121201221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100121201221010 is a deficient number, since it is larger than the sum of its proper divisors (82302503311390).

100121201221010 is a wasteful number, since it uses less digits than its factorization.

100121201221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111493406.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100121201221010 its reverse (10122102121001), we get a palindrome (110243303342011).

The spelling of 100121201221010 in words is "one hundred trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, ten".