211121426 has 8 divisors (see below), whose sum is σ = 333349680. Its totient is φ = 100004868.

The previous prime is 211121389. The next prime is 211121429. The reversal of 211121426 is 624121112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 211121398 and 211121407.

It is not an unprimeable number, because it can be changed into a prime (211121429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777876 + ... + 2777951.

It is an arithmetic number, because the mean of its divisors is an integer number (41668710).

Almost surely, 2^211121426 is an apocalyptic number.

211121426 is a deficient number, since it is larger than the sum of its proper divisors (122228254).

211121426 is a wasteful number, since it uses less digits than its factorization.

211121426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555848.

The product of its digits is 192, while the sum is 20.

The square root of 211121426 is about 14530.0181004705. The cubic root of 211121426 is about 595.4483601224.

Adding to 211121426 its reverse (624121112), we get a palindrome (835242538).

The spelling of 211121426 in words is "two hundred eleven million, one hundred twenty-one thousand, four hundred twenty-six".