1021021100340 has 96 divisors (see below), whose sum is σ = 2865004128000. Its totient is φ = 271687698432.

The previous prime is 1021021100303. The next prime is 1021021100377. The reversal of 1021021100340 is 430011201201.

It is an interprime number because it is at equal distance from previous prime (1021021100303) and next prime (1021021100377).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55817916 + ... + 55836204.

It is an arithmetic number, because the mean of its divisors is an integer number (29843793000).

Almost surely, 2^{1021021100340} is an apocalyptic number.

1021021100340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021021100340 is an abundant number, since it is smaller than the sum of its proper divisors (1843983027660).

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

1021021100340 is a wasteful number, since it uses less digits than its factorization.

1021021100340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20249 (or 20247 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1021021100340 its reverse (430011201201), we get a palindrome (1451032301541).

The spelling of 1021021100340 in words is "one trillion, twenty-one billion, twenty-one million, one hundred thousand, three hundred forty".