79121100001 has 8 divisors (see below), whose sum is σ = 83786577120. Its totient is φ = 74456877888.

The previous prime is 79121099989. The next prime is 79121100011. The reversal of 79121100001 is 10000112197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79121100001 - 2¹³ = 79121091809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79121100011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182371 + ... + 437608.

It is an arithmetic number, because the mean of its divisors is an integer number (10473322140).

Almost surely, 2^79121100001 is an apocalyptic number.

It is an amenable number.

79121100001 is a deficient number, since it is larger than the sum of its proper divisors (4665477119).

79121100001 is a wasteful number, since it uses less digits than its factorization.

79121100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627503.

The product of its (nonzero) digits is 126, while the sum is 22.

Adding to 79121100001 its reverse (10000112197), we get a palindrome (89121212198).

The spelling of 79121100001 in words is "seventy-nine billion, one hundred twenty-one million, one hundred thousand, one".