21142400333 has 2 divisors, whose sum is σ = 21142400334. Its totient is φ = 21142400332.

The previous prime is 21142400327. The next prime is 21142400407. The reversal of 21142400333 is 33300424112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14232967204 + 6909433129 = 119302^2 + 83123^2 .

It is a cyclic number.

It is not a de Polignac number, because 21142400333 - 2²⁴ = 21125623117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21142400299 and 21142400308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142400633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571200166 + 10571200167.

It is an arithmetic number, because the mean of its divisors is an integer number (10571200167).

Almost surely, 2^21142400333 is an apocalyptic number.

It is an amenable number.

21142400333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142400333 is an equidigital number, since it uses as much as digits as its factorization.

21142400333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21142400333 its reverse (33300424112), we get a palindrome (54442824445).

The spelling of 21142400333 in words is "twenty-one billion, one hundred forty-two million, four hundred thousand, three hundred thirty-three".