61012027111 has 4 divisors (see below), whose sum is σ = 69728030992. Its totient is φ = 52296023232.

The previous prime is 61012027091. The next prime is 61012027123. The reversal of 61012027111 is 11172021016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61012027111 - 2⁷ = 61012026983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61012027211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4358001930 + ... + 4358001943.

It is an arithmetic number, because the mean of its divisors is an integer number (17432007748).

Almost surely, 2^61012027111 is an apocalyptic number.

61012027111 is a deficient number, since it is larger than the sum of its proper divisors (8716003881).

61012027111 is an equidigital number, since it uses as much as digits as its factorization.

61012027111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8716003880.

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

Adding to 61012027111 its reverse (11172021016), we get a palindrome (72184048127).

The spelling of 61012027111 in words is "sixty-one billion, twelve million, twenty-seven thousand, one hundred eleven".