31311122002211 has 16 divisors (see below), whose sum is σ = 31767362013888. Its totient is φ = 30855309004800.

The previous prime is 31311122002207. The next prime is 31311122002217. The reversal of 31311122002211 is 11220022111313.

It is a cyclic number.

It is not a de Polignac number, because 31311122002211 - 2² = 31311122002207 is a prime.

It is a super-2 number, since 2×31311122002211² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311122002217) 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, 2461366331 + ... + 2461379051.

It is an arithmetic number, because the mean of its divisors is an integer number (1985460125868).

Almost surely, 2^{31311122002211} is an apocalyptic number.

31311122002211 is a deficient number, since it is larger than the sum of its proper divisors (456240011677).

31311122002211 is a wasteful number, since it uses less digits than its factorization.

31311122002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26702.

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

Adding to 31311122002211 its reverse (11220022111313), we get a palindrome (42531144113524).

The spelling of 31311122002211 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-two million, two thousand, two hundred eleven".