111201666051 has 16 divisors (see below), whose sum is σ = 173390860544. Its totient is φ = 62066045664.

The previous prime is 111201666031. The next prime is 111201666067. The reversal of 111201666051 is 150666102111.

It is not a de Polignac number, because 111201666051 - 2¹¹ = 111201664003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111201666031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61572556 + ... + 61574361.

It is an arithmetic number, because the mean of its divisors is an integer number (10836928784).

Almost surely, 2^111201666051 is an apocalyptic number.

111201666051 is a deficient number, since it is larger than the sum of its proper divisors (62189194493).

111201666051 is a wasteful number, since it uses less digits than its factorization.

111201666051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123146970.

The product of its (nonzero) digits is 2160, while the sum is 30.

Adding to 111201666051 its reverse (150666102111), we get a palindrome (261867768162).

The spelling of 111201666051 in words is "one hundred eleven billion, two hundred one million, six hundred sixty-six thousand, fifty-one".