20121021059 has 2 divisors, whose sum is σ = 20121021060. Its totient is φ = 20121021058.

The previous prime is 20121021031. The next prime is 20121021083. The reversal of 20121021059 is 95012012102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121021059 - 2¹² = 20121016963 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20121021359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060510529 + 10060510530.

It is an arithmetic number, because the mean of its divisors is an integer number (10060510530).

Almost surely, 2^20121021059 is an apocalyptic number.

20121021059 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121021059 is an equidigital number, since it uses as much as digits as its factorization.

20121021059 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 23.

The spelling of 20121021059 in words is "twenty billion, one hundred twenty-one million, twenty-one thousand, fifty-nine".