1012111012021 has 4 divisors (see below), whose sum is σ = 1014053644044. Its totient is φ = 1010168380000.

The previous prime is 1012111012001. The next prime is 1012111012043. The reversal of 1012111012021 is 1202101112101.

It is a happy number.

1012111012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 345642871396 + 666468140625 = 587914^2 + 816375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012111012021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012111011992 and 1012111012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012111012001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971315230 + ... + 971316271.

It is an arithmetic number, because the mean of its divisors is an integer number (253513411011).

Almost surely, 2^{1012111012021} is an apocalyptic number.

It is an amenable number.

1012111012021 is a deficient number, since it is larger than the sum of its proper divisors (1942632023).

1012111012021 is an equidigital number, since it uses as much as digits as its factorization.

1012111012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942632022.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1012111012021 its reverse (1202101112101), we get a palindrome (2214212124122).

The spelling of 1012111012021 in words is "one trillion, twelve billion, one hundred eleven million, twelve thousand, twenty-one".