1511221120066 has 16 divisors (see below), whose sum is σ = 2595400923456. Its totient is φ = 646482157776.

The previous prime is 1511221120063. The next prime is 1511221120099. The reversal of 1511221120066 is 6600211221151.

It is not an unprimeable number, because it can be changed into a prime (1511221120063) 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, 98661781 + ... + 98677096.

It is an arithmetic number, because the mean of its divisors is an integer number (162212557716).

Almost surely, 2^{1511221120066} is an apocalyptic number.

1511221120066 is a deficient number, since it is larger than the sum of its proper divisors (1084179803390).

1511221120066 is a wasteful number, since it uses less digits than its factorization.

1511221120066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197339433.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 1511221120066 in words is "one trillion, five hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, sixty-six".