21120022087 has 2 divisors, whose sum is σ = 21120022088. Its totient is φ = 21120022086.

The previous prime is 21120022081. The next prime is 21120022103. The reversal of 21120022087 is 78022002112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120022087 - 2⁷ = 21120021959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120022081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560011043 + 10560011044.

It is an arithmetic number, because the mean of its divisors is an integer number (10560011044).

Almost surely, 2^21120022087 is an apocalyptic number.

21120022087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120022087 is an equidigital number, since it uses as much as digits as its factorization.

21120022087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 21120022087 its reverse (78022002112), we get a palindrome (99142024199).

The spelling of 21120022087 in words is "twenty-one billion, one hundred twenty million, twenty-two thousand, eighty-seven".