40204102213521 has 32 divisors (see below), whose sum is σ = 62697966364800. Its totient is φ = 25391452734720.

The previous prime is 40204102213501. The next prime is 40204102213523. The reversal of 40204102213521 is 12531220140204.

40204102213521 is a `hidden beast` number, since 4 + 0 + 2 + 0 + 410 + 221 + 3 + 5 + 21 = 666.

It is not a de Polignac number, because 40204102213521 - 2¹⁷ = 40204102082449 is a prime.

It is a super-3 number, since 3×40204102213521³ (a number of 42 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (40204102213523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20857501 + ... + 22703381.

It is an arithmetic number, because the mean of its divisors is an integer number (1959311448900).

Almost surely, 2^{40204102213521} is an apocalyptic number.

It is an amenable number.

40204102213521 is a deficient number, since it is larger than the sum of its proper divisors (22493864151279).

40204102213521 is a wasteful number, since it uses less digits than its factorization.

40204102213521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888366 (or 1888360 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 40204102213521 its reverse (12531220140204), we get a palindrome (52735322353725).

The spelling of 40204102213521 in words is "forty trillion, two hundred four billion, one hundred two million, two hundred thirteen thousand, five hundred twenty-one".