31122001213 has 8 divisors (see below), whose sum is σ = 32158386176. Its totient is φ = 30087644400.

The previous prime is 31122001193. The next prime is 31122001231. The reversal of 31122001213 is 31210022113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31122001213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122001283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475806 + ... + 537247.

It is an arithmetic number, because the mean of its divisors is an integer number (4019798272).

Almost surely, 2^31122001213 is an apocalyptic number.

It is an amenable number.

31122001213 is a deficient number, since it is larger than the sum of its proper divisors (1036384963).

31122001213 is a wasteful number, since it uses less digits than its factorization.

31122001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014075.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31122001213 its reverse (31210022113), we get a palindrome (62332023326).

The spelling of 31122001213 in words is "thirty-one billion, one hundred twenty-two million, one thousand, two hundred thirteen".