201000001221123 has 16 divisors (see below), whose sum is σ = 297925560124416. Its totient is φ = 119702233977120.

The previous prime is 201000001221083. The next prime is 201000001221211. The reversal of 201000001221123 is 321122100000102.

It is not a de Polignac number, because 201000001221123 - 2⁶ = 201000001221059 is a prime.

It is a super-2 number, since 2×201000001221123² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201000000221123) 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, 83126550165 + ... + 83126552582.

It is an arithmetic number, because the mean of its divisors is an integer number (18620347507776).

Almost surely, 2^{201000001221123} is an apocalyptic number.

201000001221123 is a deficient number, since it is larger than the sum of its proper divisors (96925558903293).

201000001221123 is a wasteful number, since it uses less digits than its factorization.

201000001221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166253102794.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201000001221123 its reverse (321122100000102), we get a palindrome (522122101221225).

The spelling of 201000001221123 in words is "two hundred one trillion, one million, two hundred twenty-one thousand, one hundred twenty-three".