1012303123021 has 8 divisors (see below), whose sum is σ = 1022261930424. Its totient is φ = 1002361866240.

The previous prime is 1012303122997. The next prime is 1012303123159. The reversal of 1012303123021 is 1203213032101.

It can be written as a sum of positive squares in 4 ways, for example, as 195177520521 + 817125602500 = 441789^2 + 903950^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1012303123021 - 2²³ = 1012294734413 is a prime.

It is a super-2 number, since 2×1012303123021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012303123021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012303123921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4271716 + ... + 4502461.

It is an arithmetic number, because the mean of its divisors is an integer number (127782741303).

Almost surely, 2^{1012303123021} is an apocalyptic number.

It is an amenable number.

1012303123021 is a deficient number, since it is larger than the sum of its proper divisors (9958807403).

1012303123021 is a wasteful number, since it uses less digits than its factorization.

1012303123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8775311.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1012303123021 its reverse (1203213032101), we get a palindrome (2215516155122).

The spelling of 1012303123021 in words is "one trillion, twelve billion, three hundred three million, one hundred twenty-three thousand, twenty-one".