1021221340 has 24 divisors (see below), whose sum is σ = 2149276752. Its totient is φ = 407591040.

The previous prime is 1021221301. The next prime is 1021221371. The reversal of 1021221340 is 431221201.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46726 + ... + 65005.

It is an arithmetic number, because the mean of its divisors is an integer number (89553198).

Almost surely, 2^1021221340 is an apocalyptic number.

1021221340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021221340 is an abundant number, since it is smaller than the sum of its proper divisors (1128055412).

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

1021221340 is a wasteful number, since it uses less digits than its factorization.

1021221340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112197 (or 112195 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1021221340 is about 31956.5539443789. The cubic root of 1021221340 is about 1007.0243233521.

Adding to 1021221340 its reverse (431221201), we get a palindrome (1452442541).

The spelling of 1021221340 in words is "one billion, twenty-one million, two hundred twenty-one thousand, three hundred forty".