1340205054021 has 64 divisors (see below), whose sum is σ = 2121814621440. Its totient is φ = 833106677760.

The previous prime is 1340205053951. The next prime is 1340205054031. The reversal of 1340205054021 is 1204505020431.

1340205054021 is a `hidden beast` number, since 1 + 34 + 0 + 20 + 50 + 540 + 21 = 666.

It is not a de Polignac number, because 1340205054021 - 2¹⁹ = 1340204529733 is a prime.

It is a super-2 number, since 2×1340205054021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340205054031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 164984866 + ... + 164992988.

It is an arithmetic number, because the mean of its divisors is an integer number (33153353460).

Almost surely, 2^{1340205054021} is an apocalyptic number.

It is an amenable number.

1340205054021 is a deficient number, since it is larger than the sum of its proper divisors (781609567419).

1340205054021 is a wasteful number, since it uses less digits than its factorization.

1340205054021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11443 (or 11437 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 1340205054021 in words is "one trillion, three hundred forty billion, two hundred five million, fifty-four thousand, twenty-one".