11012211231 has 16 divisors (see below), whose sum is σ = 16785120000. Its totient is φ = 6290964288.

The previous prime is 11012211191. The next prime is 11012211253. The reversal of 11012211231 is 13211221011.

It is not a de Polignac number, because 11012211231 - 2⁶ = 11012211167 is a prime.

It is a super-2 number, since 2×11012211231² (a number of 21 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 11012211231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012211131) 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, 8395 + ... + 148643.

It is an arithmetic number, because the mean of its divisors is an integer number (1049070000).

Almost surely, 2^11012211231 is an apocalyptic number.

11012211231 is a deficient number, since it is larger than the sum of its proper divisors (5772908769).

11012211231 is a wasteful number, since it uses less digits than its factorization.

11012211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143998.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11012211231 its reverse (13211221011), we get a palindrome (24223432242).

The spelling of 11012211231 in words is "eleven billion, twelve million, two hundred eleven thousand, two hundred thirty-one".