31023220111121 has 16 divisors (see below), whose sum is σ = 36057277630080. Its totient is φ = 26139735697920.

The previous prime is 31023220111111. The next prime is 31023220111151. The reversal of 31023220111121 is 12111102232013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31023220111121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31023220111093 and 31023220111102.

It is not an unprimeable number, because it can be changed into a prime (31023220111111) 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, 10927211 + ... + 13470351.

It is an arithmetic number, because the mean of its divisors is an integer number (2253579851880).

Almost surely, 2^{31023220111121} is an apocalyptic number.

It is an amenable number.

31023220111121 is a deficient number, since it is larger than the sum of its proper divisors (5034057518959).

31023220111121 is a wasteful number, since it uses less digits than its factorization.

31023220111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572744.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31023220111121 its reverse (12111102232013), we get a palindrome (43134322343134).

The spelling of 31023220111121 in words is "thirty-one trillion, twenty-three billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty-one".