78020022211 has 4 divisors (see below), whose sum is σ = 79922949624. Its totient is φ = 76117094800.

The previous prime is 78020022193. The next prime is 78020022257. The reversal of 78020022211 is 11222002087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78020022211 - 2⁷ = 78020022083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78020022511) 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, 951463645 + ... + 951463726.

It is an arithmetic number, because the mean of its divisors is an integer number (19980737406).

Almost surely, 2^78020022211 is an apocalyptic number.

78020022211 is a deficient number, since it is larger than the sum of its proper divisors (1902927413).

78020022211 is a wasteful number, since it uses less digits than its factorization.

78020022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902927412.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 78020022211 its reverse (11222002087), we get a palindrome (89242024298).

The spelling of 78020022211 in words is "seventy-eight billion, twenty million, twenty-two thousand, two hundred eleven".