3540522122221 has 4 divisors (see below), whose sum is σ = 4046310996832. Its totient is φ = 3034733247612.

The previous prime is 3540522122183. The next prime is 3540522122251. The reversal of 3540522122221 is 1222212250453.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3540522122221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3540522122251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252894437295 + ... + 252894437308.

It is an arithmetic number, because the mean of its divisors is an integer number (1011577749208).

Almost surely, 2^{3540522122221} is an apocalyptic number.

It is an amenable number.

3540522122221 is a deficient number, since it is larger than the sum of its proper divisors (505788874611).

3540522122221 is an equidigital number, since it uses as much as digits as its factorization.

3540522122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505788874610.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 3540522122221 its reverse (1222212250453), we get a palindrome (4762734372674).

The spelling of 3540522122221 in words is "three trillion, five hundred forty billion, five hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".