1012110120021 has 128 divisors (see below), whose sum is σ = 2001885290496. Its totient is φ = 436918394880.

The previous prime is 1012110120001. The next prime is 1012110120071. The reversal of 1012110120021 is 1200210112101.

It is not a de Polignac number, because 1012110120021 - 2¹⁷ = 1012109988949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012110119979 and 1012110120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012110120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 743185 + ... + 1605161.

It is an arithmetic number, because the mean of its divisors is an integer number (15639728832).

Almost surely, 2^{1012110120021} is an apocalyptic number.

1012110120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012110120021 is a deficient number, since it is larger than the sum of its proper divisors (989775170475).

1012110120021 is a wasteful number, since it uses less digits than its factorization.

1012110120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862051.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1012110120021 its reverse (1200210112101), we get a palindrome (2212320232122).

The spelling of 1012110120021 in words is "one trillion, twelve billion, one hundred ten million, one hundred twenty thousand, twenty-one".