21320033051 has 2 divisors, whose sum is σ = 21320033052. Its totient is φ = 21320033050.

The previous prime is 21320033029. The next prime is 21320033113. The reversal of 21320033051 is 15033002312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21320033051 - 2¹⁴ = 21320016667 is a prime.

It is not a weakly prime, because it can be changed into another prime (21320036051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660016525 + 10660016526.

It is an arithmetic number, because the mean of its divisors is an integer number (10660016526).

Almost surely, 2^21320033051 is an apocalyptic number.

21320033051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320033051 is an equidigital number, since it uses as much as digits as its factorization.

21320033051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21320033051 its reverse (15033002312), we get a palindrome (36353035363).

The spelling of 21320033051 in words is "twenty-one billion, three hundred twenty million, thirty-three thousand, fifty-one".