11212223031 has 24 divisors (see below), whose sum is σ = 16376396400. Its totient is φ = 7391740416.

The previous prime is 11212223023. The next prime is 11212223041. The reversal of 11212223031 is 13032221211.

It is not a de Polignac number, because 11212223031 - 2³ = 11212223023 is a prime.

It is a super-2 number, since 2×11212223031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11212222995 and 11212223013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212223041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285991 + ... + 322823.

It is an arithmetic number, because the mean of its divisors is an integer number (682349850).

Almost surely, 2^11212223031 is an apocalyptic number.

11212223031 is a deficient number, since it is larger than the sum of its proper divisors (5164173369).

11212223031 is a wasteful number, since it uses less digits than its factorization.

11212223031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37215 (or 37212 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11212223031 its reverse (13032221211), we get a palindrome (24244444242).

The spelling of 11212223031 in words is "eleven billion, two hundred twelve million, two hundred twenty-three thousand, thirty-one".