780100112102221 has 4 divisors (see below), whose sum is σ = 821158012739200. Its totient is φ = 739042211465244.

The previous prime is 780100112102203. The next prime is 780100112102231. The reversal of 780100112102221 is 122201211001087.

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 780100112102221 - 2⁷ = 780100112102093 is a prime.

It is a super-2 number, since 2×780100112102221² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780100112102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780100112102231) 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, 20528950318461 + ... + 20528950318498.

It is an arithmetic number, because the mean of its divisors is an integer number (205289503184800).

Almost surely, 2^{780100112102221} is an apocalyptic number.

It is an amenable number.

780100112102221 is a deficient number, since it is larger than the sum of its proper divisors (41057900636979).

780100112102221 is a wasteful number, since it uses less digits than its factorization.

780100112102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41057900636978.

The product of its (nonzero) digits is 896, while the sum is 28.

The spelling of 780100112102221 in words is "seven hundred eighty trillion, one hundred billion, one hundred twelve million, one hundred two thousand, two hundred twenty-one".