201001111123 has 2 divisors, whose sum is σ = 201001111124. Its totient is φ = 201001111122.

The previous prime is 201001111109. The next prime is 201001111127. The reversal of 201001111123 is 321111100102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201001111123 - 2¹³ = 201001102931 is a prime.

It is a super-2 number, since 2×201001111123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201001111127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500555561 + 100500555562.

It is an arithmetic number, because the mean of its divisors is an integer number (100500555562).

Almost surely, 2^201001111123 is an apocalyptic number.

201001111123 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001111123 is an equidigital number, since it uses as much as digits as its factorization.

201001111123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 201001111123 its reverse (321111100102), we get a palindrome (522112211225).

The spelling of 201001111123 in words is "two hundred one billion, one million, one hundred eleven thousand, one hundred twenty-three".