20121111067 has 2 divisors, whose sum is σ = 20121111068. Its totient is φ = 20121111066.

The previous prime is 20121111061. The next prime is 20121111071. The reversal of 20121111067 is 76011112102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121111067 is a prime.

It is a super-2 number, since 2×20121111067² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20121111061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060555533 + 10060555534.

It is an arithmetic number, because the mean of its divisors is an integer number (10060555534).

Almost surely, 2^20121111067 is an apocalyptic number.

20121111067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121111067 is an equidigital number, since it uses as much as digits as its factorization.

20121111067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

Adding to 20121111067 its reverse (76011112102), we get a palindrome (96132223169).

The spelling of 20121111067 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, sixty-seven".