20120015611 has 2 divisors, whose sum is σ = 20120015612. Its totient is φ = 20120015610.

The previous prime is 20120015609. The next prime is 20120015621. The reversal of 20120015611 is 11651002102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20120015611 - 2¹ = 20120015609 is a prime.

Together with 20120015609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20120015621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060007805 + 10060007806.

It is an arithmetic number, because the mean of its divisors is an integer number (10060007806).

Almost surely, 2^20120015611 is an apocalyptic number.

20120015611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120015611 is an equidigital number, since it uses as much as digits as its factorization.

20120015611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 20120015611 its reverse (11651002102), we get a palindrome (31771017713).

It can be divided in two parts, 201200 and 15611, that added together give a triangular number (216811 = T₆₅₈).

The spelling of 20120015611 in words is "twenty billion, one hundred twenty million, fifteen thousand, six hundred eleven".