102120111566601 has 16 divisors (see below), whose sum is σ = 142171731230400. Its totient is φ = 65118163304768.

The previous prime is 102120111566587. The next prime is 102120111566623. The reversal of 102120111566601 is 106665111021201.

It is a cyclic number.

It is not a de Polignac number, because 102120111566601 - 2¹⁸ = 102120111304457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102120111566701) 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, 5485011186 + ... + 5485029803.

It is an arithmetic number, because the mean of its divisors is an integer number (8885733201900).

Almost surely, 2^{102120111566601} is an apocalyptic number.

It is an amenable number.

102120111566601 is a deficient number, since it is larger than the sum of its proper divisors (40051619663799).

102120111566601 is a wasteful number, since it uses less digits than its factorization.

102120111566601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10970041128.

The product of its (nonzero) digits is 4320, while the sum is 33.

Adding to 102120111566601 its reverse (106665111021201), we get a palindrome (208785222587802).

The spelling of 102120111566601 in words is "one hundred two trillion, one hundred twenty billion, one hundred eleven million, five hundred sixty-six thousand, six hundred one".