123213223111 has 16 divisors (see below), whose sum is σ = 140361527808. Its totient is φ = 107063255200.

The previous prime is 123213223073. The next prime is 123213223121. The reversal of 123213223111 is 111322312321.

It is not a de Polignac number, because 123213223111 - 2¹³ = 123213214919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123213223121) 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, 167721 + ... + 523981.

It is an arithmetic number, because the mean of its divisors is an integer number (8772595488).

Almost surely, 2^123213223111 is an apocalyptic number.

123213223111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123213223111 is a deficient number, since it is larger than the sum of its proper divisors (17148304697).

123213223111 is a wasteful number, since it uses less digits than its factorization.

123213223111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357662.

The product of its digits is 432, while the sum is 22.

Adding to 123213223111 its reverse (111322312321), we get a palindrome (234535535432).

It can be divided in two parts, 12 and 3213223111, that added together give a palindrome (3213223123).

The spelling of 123213223111 in words is "one hundred twenty-three billion, two hundred thirteen million, two hundred twenty-three thousand, one hundred eleven".