21012023333333 has 4 divisors (see below), whose sum is σ = 22248024705900. Its totient is φ = 19776021960768.

The previous prime is 21012023333317. The next prime is 21012023333339. The reversal of 21012023333333 is 33333332021012.

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 6909842880964 + 14102180452369 = 2628658^2 + 3755287^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012023333333 - 2⁴ = 21012023333317 is a prime.

It is a Duffinian number.

21012023333333 is a modest number, since divided by 3333333 gives 2101202 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21012023333296 and 21012023333305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012023333339) 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, 618000686258 + ... + 618000686291.

It is an arithmetic number, because the mean of its divisors is an integer number (5562006176475).

Almost surely, 2^{21012023333333} is an apocalyptic number.

It is an amenable number.

21012023333333 is a deficient number, since it is larger than the sum of its proper divisors (1236001372567).

21012023333333 is a wasteful number, since it uses less digits than its factorization.

21012023333333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236001372566.

The product of its (nonzero) digits is 17496, while the sum is 29.

Adding to 21012023333333 its reverse (33333332021012), we get a palindrome (54345355354345).

The spelling of 21012023333333 in words is "twenty-one trillion, twelve billion, twenty-three million, three hundred thirty-three thousand, three hundred thirty-three".