211223012122031 has 32 divisors (see below), whose sum is σ = 280623815055360. Its totient is φ = 154343098191744.

The previous prime is 211223012121997. The next prime is 211223012122069. The reversal of 211223012122031 is 130221210322112.

It is not a de Polignac number, because 211223012122031 - 2¹⁰ = 211223012121007 is a prime.

It is a super-2 number, since 2×211223012122031² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 211223012121988 and 211223012122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223012122831) 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 31 ways as a sum of consecutive naturals, for example, 1739918315 + ... + 1740039708.

It is an arithmetic number, because the mean of its divisors is an integer number (8769494220480).

Almost surely, 2^{211223012122031} is an apocalyptic number.

211223012122031 is a deficient number, since it is larger than the sum of its proper divisors (69400802933329).

211223012122031 is a wasteful number, since it uses less digits than its factorization.

211223012122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479958095.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211223012122031 its reverse (130221210322112), we get a palindrome (341444222444143).

The spelling of 211223012122031 in words is "two hundred eleven trillion, two hundred twenty-three billion, twelve million, one hundred twenty-two thousand, thirty-one".