11901660121 has 8 divisors (see below), whose sum is σ = 12818070720. Its totient is φ = 10985377872.

The previous prime is 11901660107. The next prime is 11901660131. The reversal of 11901660121 is 12106610911.

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 11901660121 - 2¹⁷ = 11901529049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11901660121.

It is not an unprimeable number, because it can be changed into a prime (11901660131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257076 + ... + 299818.

It is an arithmetic number, because the mean of its divisors is an integer number (1602258840).

Almost surely, 2^11901660121 is an apocalyptic number.

It is an amenable number.

11901660121 is a deficient number, since it is larger than the sum of its proper divisors (916410599).

11901660121 is a wasteful number, since it uses less digits than its factorization.

11901660121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64175.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 11901660121 in words is "eleven billion, nine hundred one million, six hundred sixty thousand, one hundred twenty-one".