1021203401240 has 64 divisors (see below), whose sum is σ = 2615572373760. Its totient is φ = 355201179520.

The previous prime is 1021203401221. The next prime is 1021203401243. The reversal of 1021203401240 is 421043021201.

1021203401240 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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021203401243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50444594 + ... + 50464833.

It is an arithmetic number, because the mean of its divisors is an integer number (40868318340).

Almost surely, 2^{1021203401240} is an apocalyptic number.

1021203401240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021203401240 is an abundant number, since it is smaller than the sum of its proper divisors (1594368972520).

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

1021203401240 is a wasteful number, since it uses less digits than its factorization.

1021203401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100909472 (or 100909468 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1021203401240 its reverse (421043021201), we get a palindrome (1442246422441).

The spelling of 1021203401240 in words is "one trillion, twenty-one billion, two hundred three million, four hundred one thousand, two hundred forty".