1012101022021 has 4 divisors (see below), whose sum is σ = 1036786412844. Its totient is φ = 987415631200.

The previous prime is 1012101021949. The next prime is 1012101022027. The reversal of 1012101022021 is 1202201012101.

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 162339691396 + 849761330625 = 402914^2 + 921825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012101022021 - 2⁹ = 1012101021509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012101021992 and 1012101022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012101022027) 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, 12342695350 + ... + 12342695431.

It is an arithmetic number, because the mean of its divisors is an integer number (259196603211).

Almost surely, 2^{1012101022021} is an apocalyptic number.

It is an amenable number.

1012101022021 is a deficient number, since it is larger than the sum of its proper divisors (24685390823).

1012101022021 is an equidigital number, since it uses as much as digits as its factorization.

1012101022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24685390822.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012101022021 its reverse (1202201012101), we get a palindrome (2214302034122).

The spelling of 1012101022021 in words is "one trillion, twelve billion, one hundred one million, twenty-two thousand, twenty-one".