211220233123 has 32 divisors (see below), whose sum is σ = 223059916800. Its totient is φ = 199817280000.

The previous prime is 211220233121. The next prime is 211220233151. The reversal of 211220233123 is 321332022112.

It is a cyclic number.

It is not a de Polignac number, because 211220233123 - 2¹ = 211220233121 is a prime.

It is a super-2 number, since 2×211220233123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211220233094 and 211220233103.

It is not an unprimeable number, because it can be changed into a prime (211220233121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59346418 + ... + 59349976.

It is an arithmetic number, because the mean of its divisors is an integer number (6970622400).

Almost surely, 2^211220233123 is an apocalyptic number.

211220233123 is a deficient number, since it is larger than the sum of its proper divisors (11839683677).

211220233123 is a wasteful number, since it uses less digits than its factorization.

211220233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 211220233123 its reverse (321332022112), we get a palindrome (532552255235).

The spelling of 211220233123 in words is "two hundred eleven billion, two hundred twenty million, two hundred thirty-three thousand, one hundred twenty-three".