78231101101 has 4 divisors (see below), whose sum is σ = 78234890400. Its totient is φ = 78227311804.

The previous prime is 78231101099. The next prime is 78231101183. The reversal of 78231101101 is 10110113287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78231101101 - 2¹ = 78231101099 is a prime.

It is a super-2 number, since 2×78231101101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78231101701) 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, 1863511 + ... + 1905028.

It is an arithmetic number, because the mean of its divisors is an integer number (19558722600).

Almost surely, 2^78231101101 is an apocalyptic number.

It is an amenable number.

78231101101 is a deficient number, since it is larger than the sum of its proper divisors (3789299).

78231101101 is a wasteful number, since it uses less digits than its factorization.

78231101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789298.

The product of its (nonzero) digits is 336, while the sum is 25.

Adding to 78231101101 its reverse (10110113287), we get a palindrome (88341214388).

The spelling of 78231101101 in words is "seventy-eight billion, two hundred thirty-one million, one hundred one thousand, one hundred one".