1021240436020 has 48 divisors (see below), whose sum is σ = 2451042518400. Its totient is φ = 350130225024.

The previous prime is 1021240436017. The next prime is 1021240436053. The reversal of 1021240436020 is 206340421201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7004707 + ... + 7149013.

It is an arithmetic number, because the mean of its divisors is an integer number (51063385800).

Almost surely, 2^{1021240436020} is an apocalyptic number.

1021240436020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021240436020 is an abundant number, since it is smaller than the sum of its proper divisors (1429802082380).

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

1021240436020 is a wasteful number, since it uses less digits than its factorization.

1021240436020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194872 (or 194870 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1021240436020 its reverse (206340421201), we get a palindrome (1227580857221).

The spelling of 1021240436020 in words is "one trillion, twenty-one billion, two hundred forty million, four hundred thirty-six thousand, twenty".