211421004444 has 48 divisors (see below), whose sum is σ = 590292267040. Its totient is φ = 65052616320.

The previous prime is 211421004329. The next prime is 211421004481. The reversal of 211421004444 is 444400124112.

It is a happy number.

211421004444 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 210 + 0 + 4 + 444 = 666.

It is a super-2 number, since 2×211421004444² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75290977 + ... + 75293784.

Almost surely, 2^211421004444 is an apocalyptic number.

It is an amenable number.

211421004444 is an abundant number, since it is smaller than the sum of its proper divisors (378871262596).

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

211421004444 is a wasteful number, since it uses less digits than its factorization.

211421004444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150584787 (or 150584779 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 211421004444 its reverse (444400124112), we get a palindrome (655821128556).

The spelling of 211421004444 in words is "two hundred eleven billion, four hundred twenty-one million, four thousand, four hundred forty-four".