201321123 has 8 divisors (see below), whose sum is σ = 284218128. Its totient is φ = 126319104.

The previous prime is 201321101. The next prime is 201321149. The reversal of 201321123 is 321123102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201321123 - 2⁵ = 201321091 is a prime.

It is a super-2 number, since 2×201321123² = 81060389131962258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201321023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1973686 + ... + 1973787.

It is an arithmetic number, because the mean of its divisors is an integer number (35527266).

Almost surely, 2^201321123 is an apocalyptic number.

201321123 is a deficient number, since it is larger than the sum of its proper divisors (82897005).

201321123 is a wasteful number, since it uses less digits than its factorization.

201321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947493.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 201321123 is about 14188.7674940426. The cubic root of 201321123 is about 586.0883850966.

Adding to 201321123 its reverse (321123102), we get a palindrome (522444225).

The spelling of 201321123 in words is "two hundred one million, three hundred twenty-one thousand, one hundred twenty-three".