21021030367 has 2 divisors, whose sum is σ = 21021030368. Its totient is φ = 21021030366.

The previous prime is 21021030293. The next prime is 21021030379. The reversal of 21021030367 is 76303012012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21021030367 - 2²³ = 21012641759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021030397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510515183 + 10510515184.

It is an arithmetic number, because the mean of its divisors is an integer number (10510515184).

Almost surely, 2^21021030367 is an apocalyptic number.

21021030367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021030367 is an equidigital number, since it uses as much as digits as its factorization.

21021030367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 21021030367 its reverse (76303012012), we get a palindrome (97324042379).

The spelling of 21021030367 in words is "twenty-one billion, twenty-one million, thirty thousand, three hundred sixty-seven".