201000122111097 has 48 divisors (see below), whose sum is σ = 297182347896720. Its totient is φ = 130876301297664.

The previous prime is 201000122111081. The next prime is 201000122111179. The reversal of 201000122111097 is 790111221000102.

It can be written as a sum of positive squares in 8 ways, for example, as 8952327297936 + 192047794813161 = 2992044^2 + 13858131^2 .

It is not a de Polignac number, because 201000122111097 - 2⁴ = 201000122111081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201000122111097.

It is not an unprimeable number, because it can be changed into a prime (201000122111077) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123295533 + ... + 124915125.

It is an arithmetic number, because the mean of its divisors is an integer number (6191298914515).

Almost surely, 2^{201000122111097} is an apocalyptic number.

It is an amenable number.

201000122111097 is a deficient number, since it is larger than the sum of its proper divisors (96182225785623).

201000122111097 is a wasteful number, since it uses less digits than its factorization.

201000122111097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621514 (or 1621511 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

Adding to 201000122111097 its reverse (790111221000102), we get a palindrome (991111343111199).

The spelling of 201000122111097 in words is "two hundred one trillion, one hundred twenty-two million, one hundred eleven thousand, ninety-seven".