21012222059 has 2 divisors, whose sum is σ = 21012222060. Its totient is φ = 21012222058.

The previous prime is 21012222017. The next prime is 21012222109. The reversal of 21012222059 is 95022221012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012222059 - 2²⁴ = 20995444843 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012222659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506111029 + 10506111030.

It is an arithmetic number, because the mean of its divisors is an integer number (10506111030).

Almost surely, 2^21012222059 is an apocalyptic number.

21012222059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012222059 is an equidigital number, since it uses as much as digits as its factorization.

21012222059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 21012222059 in words is "twenty-one billion, twelve million, two hundred twenty-two thousand, fifty-nine".