1021202240 has 56 divisors (see below), whose sum is σ = 2574794952. Its totient is φ = 384450560.

The previous prime is 1021202207. The next prime is 1021202249. The reversal of 1021202240 is 422021201.

It can be written as a sum of positive squares in 4 ways, for example, as 82882816 + 938319424 = 9104^2 + 30632^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021202249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88421 + ... + 99300.

Almost surely, 2^1021202240 is an apocalyptic number.

1021202240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021202240 is an abundant number, since it is smaller than the sum of its proper divisors (1553592712).

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

1021202240 is a wasteful number, since it uses less digits than its factorization.

1021202240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187755 (or 187745 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1021202240 is about 31956.2550997453. The cubic root of 1021202240 is about 1007.0180451557.

Adding to 1021202240 its reverse (422021201), we get a palindrome (1443223441).

The spelling of 1021202240 in words is "one billion, twenty-one million, two hundred two thousand, two hundred forty".