31023020201111 has 4 divisors (see below), whose sum is σ = 31036851242232. Its totient is φ = 31009189159992.

The previous prime is 31023020201099. The next prime is 31023020201137. The reversal of 31023020201111 is 11110202032013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31023020201111 - 2³⁸ = 30748142294167 is a prime.

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 31023020201111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023020201191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6915517196 + ... + 6915521681.

It is an arithmetic number, because the mean of its divisors is an integer number (7759212810558).

Almost surely, 2^{31023020201111} is an apocalyptic number.

31023020201111 is a deficient number, since it is larger than the sum of its proper divisors (13831041121).

31023020201111 is a wasteful number, since it uses less digits than its factorization.

31023020201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831041120.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31023020201111 its reverse (11110202032013), we get a palindrome (42133222233124).

The spelling of 31023020201111 in words is "thirty-one trillion, twenty-three billion, twenty million, two hundred one thousand, one hundred eleven".