21012023003012 has 12 divisors (see below), whose sum is σ = 37373844194316. Its totient is φ = 10333781804640.

The previous prime is 21012023002987. The next prime is 21012023003017. The reversal of 21012023003012 is 21030032021012.

It can be written as a sum of positive squares in 2 ways, for example, as 6763089152836 + 14248933850176 = 2600594^2 + 3774776^2 .

It is a super-2 number, since 2×21012023003012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21012023003017) 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, 43057423943 + ... + 43057424430.

It is an arithmetic number, because the mean of its divisors is an integer number (3114487016193).

Almost surely, 2^{21012023003012} is an apocalyptic number.

It is an amenable number.

21012023003012 is a deficient number, since it is larger than the sum of its proper divisors (16361821191304).

21012023003012 is a wasteful number, since it uses less digits than its factorization.

21012023003012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86114848438 (or 86114848436 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21012023003012 its reverse (21030032021012), we get a palindrome (42042055024024).

The spelling of 21012023003012 in words is "twenty-one trillion, twelve billion, twenty-three million, three thousand, twelve".