211221122 has 16 divisors (see below), whose sum is σ = 362509440. Its totient is φ = 90419328.

The previous prime is 211221091. The next prime is 211221169. The reversal of 211221122 is 221122112.

211221122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221122² = 89228724757877768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211221097 and 211221106.

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, 4658 + ... + 21074.

It is an arithmetic number, because the mean of its divisors is an integer number (22656840).

Almost surely, 2^211221122 is an apocalyptic number.

211221122 is a deficient number, since it is larger than the sum of its proper divisors (151288318).

211221122 is a wasteful number, since it uses less digits than its factorization.

211221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17345.

The product of its digits is 32, while the sum is 14.

The square root of 211221122 is about 14533.4483863947. The cubic root of 211221122 is about 595.5420731403.

Adding to 211221122 its reverse (221122112), we get a palindrome (432343234).

It can be divided in two parts, 21122112 and 2, that multiplied together give a palindrome (42244224).

The spelling of 211221122 in words is "two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-two".