1021102240 has 48 divisors (see below), whose sum is σ = 2457890568. Its totient is φ = 400731136.

The previous prime is 1021102193. The next prime is 1021102259. The reversal of 1021102240 is 422011201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1019652624 + 1449616 = 31932^2 + 1204^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021102240.

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, 51727 + ... + 68686.

Almost surely, 2^1021102240 is an apocalyptic number.

1021102240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021102240 is an abundant number, since it is smaller than the sum of its proper divisors (1436788328).

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

1021102240 is a wasteful number, since it uses less digits than its factorization.

1021102240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120481 (or 120473 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1021102240 is about 31954.6904225342. The cubic root of 1021102240 is about 1006.9851737394.

Adding to 1021102240 its reverse (422011201), we get a palindrome (1443113441).

The spelling of 1021102240 in words is "one billion, twenty-one million, one hundred two thousand, two hundred forty".