1340204103021 has 16 divisors (see below), whose sum is σ = 2068066611200. Its totient is φ = 756136852848.

The previous prime is 1340204102987. The next prime is 1340204103031. The reversal of 1340204103021 is 1203014020431.

It is not a de Polignac number, because 1340204103021 - 2²³ = 1340195714413 is a prime.

It is a super-2 number, since 2×1340204103021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340204103031) 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, 403917601 + ... + 403920918.

It is an arithmetic number, because the mean of its divisors is an integer number (129254163200).

Almost surely, 2^{1340204103021} is an apocalyptic number.

It is an amenable number.

1340204103021 is a deficient number, since it is larger than the sum of its proper divisors (727862508179).

1340204103021 is an equidigital number, since it uses as much as digits as its factorization.

1340204103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807838608.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1340204103021 its reverse (1203014020431), we get a palindrome (2543218123452).

The spelling of 1340204103021 in words is "one trillion, three hundred forty billion, two hundred four million, one hundred three thousand, twenty-one".