1011000100121 has 4 divisors (see below), whose sum is σ = 1102909200144. Its totient is φ = 919091000100.

The previous prime is 1011000100037. The next prime is 1011000100141. The reversal of 1011000100121 is 1210010001101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011000100121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011000100099 and 1011000100108.

It is not an unprimeable number, because it can be changed into a prime (1011000100141) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 45954549995 + ... + 45954550016.

It is an arithmetic number, because the mean of its divisors is an integer number (275727300036).

Almost surely, 2^{1011000100121} is an apocalyptic number.

1011000100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011000100121 is a deficient number, since it is larger than the sum of its proper divisors (91909100023).

1011000100121 is an equidigital number, since it uses as much as digits as its factorization.

1011000100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91909100022.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1011000100121 its reverse (1210010001101), we get a palindrome (2221010101222).

The spelling of 1011000100121 in words is "one trillion, eleven billion, one hundred thousand, one hundred twenty-one".