1022221992 has 64 divisors (see below), whose sum is σ = 2792908800. Its totient is φ = 309205440.

The previous prime is 1022221961. The next prime is 1022221997. The reversal of 1022221992 is 2991222201.

It is not an unprimeable number, because it can be changed into a prime (1022221997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157059 + ... + 163437.

It is an arithmetic number, because the mean of its divisors is an integer number (43639200).

Almost surely, 2^1022221992 is an apocalyptic number.

1022221992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022221992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396454400).

1022221992 is an abundant number, since it is smaller than the sum of its proper divisors (1770686808).

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

1022221992 is a wasteful number, since it uses less digits than its factorization.

1022221992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006 (or 7002 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1022221992 is about 31972.2065550690. The cubic root of 1022221992 is about 1007.3531296271.

It can be divided in two parts, 102222199 and 2, that added together give a palindrome (102222201).

The spelling of 1022221992 in words is "one billion, twenty-two million, two hundred twenty-one thousand, nine hundred ninety-two".