31211200011 has 8 divisors (see below), whose sum is σ = 41618767680. Its totient is φ = 20805549512.

The previous prime is 31211199991. The next prime is 31211200063. The reversal of 31211200011 is 11000211213.

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

It is a cyclic number.

It is not a de Polignac number, because 31211200011 - 2⁶ = 31211199947 is a prime.

It is a super-2 number, since 2×31211200011² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31211200011.

It is not an unprimeable number, because it can be changed into a prime (31211200511) 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, 440865 + ... + 506738.

It is an arithmetic number, because the mean of its divisors is an integer number (5202345960).

Almost surely, 2^31211200011 is an apocalyptic number.

31211200011 is a deficient number, since it is larger than the sum of its proper divisors (10407567669).

31211200011 is a wasteful number, since it uses less digits than its factorization.

31211200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958585.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 31211200011 its reverse (11000211213), we get a palindrome (42211411224).

The spelling of 31211200011 in words is "thirty-one billion, two hundred eleven million, two hundred thousand, eleven".