1021222320 has 40 divisors (see below), whose sum is σ = 3165789936. Its totient is φ = 272325888.

The previous prime is 1021222313. The next prime is 1021222337. The reversal of 1021222320 is 232221201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1021222320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2127307 + ... + 2127786.

Almost surely, 2^1021222320 is an apocalyptic number.

1021222320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021222320 is an abundant number, since it is smaller than the sum of its proper divisors (2144567616).

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

1021222320 is a wasteful number, since it uses less digits than its factorization.

1021222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255109 (or 4255103 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1021222320 is about 31956.5692776931. The cubic root of 1021222320 is about 1007.0246454774.

Adding to 1021222320 its reverse (232221201), we get a palindrome (1253443521).

The spelling of 1021222320 in words is "one billion, twenty-one million, two hundred twenty-two thousand, three hundred twenty".