20121021083 has 2 divisors, whose sum is σ = 20121021084. Its totient is φ = 20121021082.

The previous prime is 20121021059. The next prime is 20121021101. The reversal of 20121021083 is 38012012102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121021083 - 2¹⁸ = 20120758939 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121029083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060510541 + 10060510542.

It is an arithmetic number, because the mean of its divisors is an integer number (10060510542).

Almost surely, 2^20121021083 is an apocalyptic number.

20121021083 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121021083 is an equidigital number, since it uses as much as digits as its factorization.

20121021083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20121021083 its reverse (38012012102), we get a palindrome (58133033185).

The spelling of 20121021083 in words is "twenty billion, one hundred twenty-one million, twenty-one thousand, eighty-three".