21020012059 has 2 divisors, whose sum is σ = 21020012060. Its totient is φ = 21020012058.

The previous prime is 21020011973. The next prime is 21020012081. The reversal of 21020012059 is 95021002012.

It is an a-pointer prime, because the next prime (21020012081) can be obtained adding 21020012059 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020012059 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020012099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510006029 + 10510006030.

It is an arithmetic number, because the mean of its divisors is an integer number (10510006030).

Almost surely, 2^21020012059 is an apocalyptic number.

21020012059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020012059 is an equidigital number, since it uses as much as digits as its factorization.

21020012059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The spelling of 21020012059 in words is "twenty-one billion, twenty million, twelve thousand, fifty-nine".