1021221045240 has 64 divisors (see below), whose sum is σ = 3342177970560. Its totient is φ = 247568737920.

The previous prime is 1021221045239. The next prime is 1021221045259. The reversal of 1021221045240 is 425401221201.

1021221045240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1021221045240.

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, 386824834 + ... + 386827473.

It is an arithmetic number, because the mean of its divisors is an integer number (52221530790).

Almost surely, 2^{1021221045240} is an apocalyptic number.

1021221045240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021221045240 is an abundant number, since it is smaller than the sum of its proper divisors (2320956925320).

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

1021221045240 is a wasteful number, since it uses less digits than its factorization.

1021221045240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773652332 (or 773652328 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 1021221045240 its reverse (425401221201), we get a palindrome (1446622266441).

The spelling of 1021221045240 in words is "one trillion, twenty-one billion, two hundred twenty-one million, forty-five thousand, two hundred forty".