211220212212123 has 64 divisors (see below), whose sum is σ = 306535716168192. Its totient is φ = 128887813068800.

The previous prime is 211220212212083. The next prime is 211220212212169. The reversal of 211220212212123 is 321212212022112.

It is a cyclic number.

It is not a de Polignac number, because 211220212212123 - 2⁸ = 211220212211867 is a prime.

It is a super-2 number, since 2×211220212212123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220212212093 and 211220212212102.

It is not an unprimeable number, because it can be changed into a prime (211220212212173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72535336 + ... + 75391082.

It is an arithmetic number, because the mean of its divisors is an integer number (4789620565128).

Almost surely, 2^{211220212212123} is an apocalyptic number.

211220212212123 is a deficient number, since it is larger than the sum of its proper divisors (95315503956069).

211220212212123 is a wasteful number, since it uses less digits than its factorization.

211220212212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856124.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 211220212212123 its reverse (321212212022112), we get a palindrome (532432424234235).

The spelling of 211220212212123 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-three".