211421322 has 96 divisors (see below), whose sum is σ = 563097600. Its totient is φ = 55979424.

The previous prime is 211421321. The next prime is 211421387. The reversal of 211421322 is 223124112.

It is a happy number.

211421322 is a `hidden beast` number, since 211 + 421 + 32 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 211421295 and 211421304.

It is not an unprimeable number, because it can be changed into a prime (211421321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111579 + ... + 113457.

It is an arithmetic number, because the mean of its divisors is an integer number (5865600).

Almost surely, 2^211421322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211421322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281548800).

211421322 is an abundant number, since it is smaller than the sum of its proper divisors (351676278).

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

211421322 is a wasteful number, since it uses less digits than its factorization.

211421322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1957 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 211421322 is about 14540.3343152762. The cubic root of 211421322 is about 595.7301696603.

Adding to 211421322 its reverse (223124112), we get a palindrome (434545434).

It can be divided in two parts, 2114 and 21322, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 211421322 in words is "two hundred eleven million, four hundred twenty-one thousand, three hundred twenty-two".