123111112210 has 32 divisors (see below), whose sum is σ = 235375573680. Its totient is φ = 46201485312.

The previous prime is 123111112207. The next prime is 123111112277. The reversal of 123111112210 is 12211111321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5768554401 + 117342557809 = 75951^2 + 342553^2 .

It is a super-2 number, since 2×123111112210² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088355 + ... + 1196134.

Almost surely, 2^123111112210 is an apocalyptic number.

123111112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123111112210 is a deficient number, since it is larger than the sum of its proper divisors (112264461470).

123111112210 is a wasteful number, since it uses less digits than its factorization.

123111112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284830.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 123111112210 its reverse (12211111321), we get a palindrome (135322223531).

The spelling of 123111112210 in words is "one hundred twenty-three billion, one hundred eleven million, one hundred twelve thousand, two hundred ten".