1511042240221 has 8 divisors (see below), whose sum is σ = 1590626167200. Its totient is φ = 1431463852080.

The previous prime is 1511042240207. The next prime is 1511042240233. The reversal of 1511042240221 is 1220422401151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1511042240221 - 2⁷ = 1511042240093 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 (1511042240251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818791 + ... + 1921588.

It is an arithmetic number, because the mean of its divisors is an integer number (198828270900).

Almost surely, 2^{1511042240221} is an apocalyptic number.

It is an amenable number.

1511042240221 is a deficient number, since it is larger than the sum of its proper divisors (79583926979).

1511042240221 is a wasteful number, since it uses less digits than its factorization.

1511042240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769419.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 1511042240221 its reverse (1220422401151), we get a palindrome (2731464641372).

The spelling of 1511042240221 in words is "one trillion, five hundred eleven billion, forty-two million, two hundred forty thousand, two hundred twenty-one".