1012111222021 has 2 divisors, whose sum is σ = 1012111222022. Its totient is φ = 1012111222020.

The previous prime is 1012111222013. The next prime is 1012111222033. The reversal of 1012111222021 is 1202221112101.

1012111222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815165208225 + 196946013796 = 902865^2 + 443786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012111222021 - 2³ = 1012111222013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012111221986 and 1012111222004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012111222051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506055611010 + 506055611011.

It is an arithmetic number, because the mean of its divisors is an integer number (506055611011).

Almost surely, 2^{1012111222021} is an apocalyptic number.

It is an amenable number.

1012111222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012111222021 is an equidigital number, since it uses as much as digits as its factorization.

1012111222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1012111222021 its reverse (1202221112101), we get a palindrome (2214332334122).

The spelling of 1012111222021 in words is "one trillion, twelve billion, one hundred eleven million, two hundred twenty-two thousand, twenty-one".