40402033405121 has 4 divisors (see below), whose sum is σ = 40402074562500. Its totient is φ = 40401992247744.

The previous prime is 40402033405103. The next prime is 40402033405199. The reversal of 40402033405121 is 12150433020404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15568864147600 + 24833169257521 = 3945740^2 + 4983289^2 .

It is a cyclic number.

It is not a de Polignac number, because 40402033405121 - 2⁶ = 40402033405057 is a prime.

It is a super-2 number, since 2×40402033405121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40402033402121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19069316 + ... + 21081813.

It is an arithmetic number, because the mean of its divisors is an integer number (10100518640625).

Almost surely, 2^{40402033405121} is an apocalyptic number.

It is an amenable number.

40402033405121 is a deficient number, since it is larger than the sum of its proper divisors (41157379).

40402033405121 is a wasteful number, since it uses less digits than its factorization.

40402033405121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41157378.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 40402033405121 its reverse (12150433020404), we get a palindrome (52552466425525).

The spelling of 40402033405121 in words is "forty trillion, four hundred two billion, thirty-three million, four hundred five thousand, one hundred twenty-one".