211223311420 has 24 divisors (see below), whose sum is σ = 483893404848. Its totient is φ = 76808476800.

The previous prime is 211223311393. The next prime is 211223311459. The reversal of 211223311420 is 24113322112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211223311391 and 211223311400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480052761 + ... + 480053200.

It is an arithmetic number, because the mean of its divisors is an integer number (20162225202).

Almost surely, 2^211223311420 is an apocalyptic number.

211223311420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223311420 is an abundant number, since it is smaller than the sum of its proper divisors (272670093428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211223311420 is a wasteful number, since it uses less digits than its factorization.

211223311420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960105981 (or 960105979 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 211223311420 its reverse (24113322112), we get a palindrome (235336633532).

The spelling of 211223311420 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred eleven thousand, four hundred twenty".