872221101122278 has 4 divisors (see below), whose sum is σ = 1308331651683420. Its totient is φ = 436110550561138.

The previous prime is 872221101122237. The next prime is 872221101122309.

872221101122278 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×872221101122278² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218055275280568 + ... + 218055275280571.

It is an arithmetic number, because the mean of its divisors is an integer number (327082912920855).

Almost surely, 2^{872221101122278} is an apocalyptic number.

872221101122278 is a deficient number, since it is larger than the sum of its proper divisors (436110550561142).

872221101122278 is a wasteful number, since it uses less digits than its factorization.

872221101122278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436110550561141.

The product of its (nonzero) digits is 200704, while the sum is 46.

It can be divided in two parts, 87222110 and 1122278, that added together give a palindrome (88344388).

The spelling of 872221101122278 in words is "eight hundred seventy-two trillion, two hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, two hundred seventy-eight".