222211020978 has 48 divisors (see below), whose sum is σ = 499984168320. Its totient is φ = 73967205456.

The previous prime is 222211020943. The next prime is 222211020979. The reversal of 222211020978 is 879020112222.

It is a super-3 number, since 3×222211020978³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (222211020979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31476 + ... + 667392.

It is an arithmetic number, because the mean of its divisors is an integer number (10416336840).

Almost surely, 2^222211020978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222211020978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249992084160).

222211020978 is an abundant number, since it is smaller than the sum of its proper divisors (277773147342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222211020978 is an equidigital number, since it uses as much as digits as its factorization.

222211020978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636653 (or 636641 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 222211020978 in words is "two hundred twenty-two billion, two hundred eleven million, twenty thousand, nine hundred seventy-eight".