211421122 has 12 divisors (see below), whose sum is σ = 348583158. Its totient is φ = 96100400.

The previous prime is 211421117. The next prime is 211421123. The reversal of 211421122 is 221124112.

It can be written as a sum of positive squares in only one way, i.e., 207965241 + 3455881 = 14421^2 + 1859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211421096 and 211421105.

It is not an unprimeable number, because it can be changed into a prime (211421123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436579 + ... + 437062.

Almost surely, 2^211421122 is an apocalyptic number.

211421122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211421122 is a deficient number, since it is larger than the sum of its proper divisors (137162036).

211421122 is a wasteful number, since it uses less digits than its factorization.

211421122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873665 (or 873654 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 211421122 is about 14540.3274378537. The cubic root of 211421122 is about 595.7299818110.

Adding to 211421122 its reverse (221124112), we get a palindrome (432545234).

The spelling of 211421122 in words is "two hundred eleven million, four hundred twenty-one thousand, one hundred twenty-two".