211222022004 has 288 divisors, whose sum is σ = 639503155200. Its totient is φ = 59713708032.

The previous prime is 211222021993. The next prime is 211222022041. The reversal of 211222022004 is 400220222112.

It is a super-2 number, since 2×211222022004² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 347976669 + ... + 347977275.

Almost surely, 2^211222022004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211222022004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319751577600).

211222022004 is an abundant number, since it is smaller than the sum of its proper divisors (428281133196).

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

211222022004 is a wasteful number, since it uses less digits than its factorization.

211222022004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 211222022004 its reverse (400220222112), we get a palindrome (611442244116).

The spelling of 211222022004 in words is "two hundred eleven billion, two hundred twenty-two million, twenty-two thousand, four".