211123023220123 has 32 divisors (see below), whose sum is σ = 258150667299840. Its totient is φ = 168624884972160.

The previous prime is 211123023220111. The next prime is 211123023220133. The reversal of 211123023220123 is 321022320321112.

It is a cyclic number.

It is not a de Polignac number, because 211123023220123 - 2⁴¹ = 208923999964571 is a prime.

It is a super-2 number, since 2×211123023220123² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211123023220133) 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, 558090786 + ... + 558468952.

It is an arithmetic number, because the mean of its divisors is an integer number (8067208353120).

Almost surely, 2^{211123023220123} is an apocalyptic number.

211123023220123 is a deficient number, since it is larger than the sum of its proper divisors (47027644079717).

211123023220123 is a wasteful number, since it uses less digits than its factorization.

211123023220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447067.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 211123023220123 its reverse (321022320321112), we get a palindrome (532145343541235).

The spelling of 211123023220123 in words is "two hundred eleven trillion, one hundred twenty-three billion, twenty-three million, two hundred twenty thousand, one hundred twenty-three".