211220222131 has 2 divisors, whose sum is σ = 211220222132. Its totient is φ = 211220222130.

The previous prime is 211220222123. The next prime is 211220222141. The reversal of 211220222131 is 131222022112.

211220222131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220222131 - 2³ = 211220222123 is a prime.

It is a super-2 number, since 2×211220222131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220222099 and 211220222108.

It is not a weakly prime, because it can be changed into another prime (211220222141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610111065 + 105610111066.

It is an arithmetic number, because the mean of its divisors is an integer number (105610111066).

Almost surely, 2^211220222131 is an apocalyptic number.

211220222131 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220222131 is an equidigital number, since it uses as much as digits as its factorization.

211220222131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211220222131 its reverse (131222022112), we get a palindrome (342442244243).

The spelling of 211220222131 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, one hundred thirty-one".