202011331123 has 6 divisors (see below), whose sum is σ = 234992772996. Its totient is φ = 173152569492.

The previous prime is 202011331013. The next prime is 202011331127. The reversal of 202011331123 is 321133110202.

It is not a de Polignac number, because 202011331123 - 2⁹ = 202011330611 is a prime.

It is a super-2 number, since 2×202011331123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202011331123.

It is not an unprimeable number, because it can be changed into a prime (202011331127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2061340065 + ... + 2061340162.

It is an arithmetic number, because the mean of its divisors is an integer number (39165462166).

Almost surely, 2^202011331123 is an apocalyptic number.

202011331123 is a deficient number, since it is larger than the sum of its proper divisors (32981441873).

202011331123 is an equidigital number, since it uses as much as digits as its factorization.

202011331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122680241 (or 4122680234 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 202011331123 its reverse (321133110202), we get a palindrome (523144441325).

The spelling of 202011331123 in words is "two hundred two billion, eleven million, three hundred thirty-one thousand, one hundred twenty-three".