31143011211111 has 16 divisors (see below), whose sum is σ = 42651247516416. Its totient is φ = 20202062958336.

The previous prime is 31143011211107. The next prime is 31143011211119. The reversal of 31143011211111 is 11111211034113.

It is not a de Polignac number, because 31143011211111 - 2² = 31143011211107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143011211119) 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, 458936970 + ... + 459004823.

It is an arithmetic number, because the mean of its divisors is an integer number (2665702969776).

Almost surely, 2^{31143011211111} is an apocalyptic number.

31143011211111 is a deficient number, since it is larger than the sum of its proper divisors (11508236305305).

31143011211111 is a wasteful number, since it uses less digits than its factorization.

31143011211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917942102.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 31143011211111 its reverse (11111211034113), we get a palindrome (42254222245224).

The spelling of 31143011211111 in words is "thirty-one trillion, one hundred forty-three billion, eleven million, two hundred eleven thousand, one hundred eleven".