291010122001 has 16 divisors (see below), whose sum is σ = 294590261248. Its totient is φ = 287454258000.

The previous prime is 291010121999. The next prime is 291010122017. The reversal of 291010122001 is 100221010192.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 291010122001 - 2¹ = 291010121999 is a prime.

It is a super-2 number, since 2×291010122001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 291010122001.

It is not an unprimeable number, because it can be changed into a prime (291010122031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42276106 + ... + 42282988.

It is an arithmetic number, because the mean of its divisors is an integer number (18411891328).

Almost surely, 2^291010122001 is an apocalyptic number.

It is an amenable number.

291010122001 is a deficient number, since it is larger than the sum of its proper divisors (3580139247).

291010122001 is a wasteful number, since it uses less digits than its factorization.

291010122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8572.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 291010122001 its reverse (100221010192), we get a palindrome (391231132193).

The spelling of 291010122001 in words is "two hundred ninety-one billion, ten million, one hundred twenty-two thousand, one".