201211022123 has 4 divisors (see below), whose sum is σ = 207701700288. Its totient is φ = 194720343960.

The previous prime is 201211022099. The next prime is 201211022137. The reversal of 201211022123 is 321220112102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321220112102 = 2 ⋅160610056051.

It is a cyclic number.

It is not a de Polignac number, because 201211022123 - 2⁶ = 201211022059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201211025123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245339036 + ... + 3245339097.

It is an arithmetic number, because the mean of its divisors is an integer number (51925425072).

Almost surely, 2^201211022123 is an apocalyptic number.

201211022123 is a deficient number, since it is larger than the sum of its proper divisors (6490678165).

201211022123 is an equidigital number, since it uses as much as digits as its factorization.

201211022123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490678164.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201211022123 its reverse (321220112102), we get a palindrome (522431134225).

The spelling of 201211022123 in words is "two hundred one billion, two hundred eleven million, twenty-two thousand, one hundred twenty-three".