211411011421 has 4 divisors (see below), whose sum is σ = 211412645532. Its totient is φ = 211409377312.

The previous prime is 211411011359. The next prime is 211411011473. The reversal of 211411011421 is 124110114112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158089736025 + 53321275396 = 397605^2 + 230914^2 .

It is a cyclic number.

It is not a de Polignac number, because 211411011421 - 2⁷ = 211411011293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211411011121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 604576 + ... + 887881.

It is an arithmetic number, because the mean of its divisors is an integer number (52853161383).

Almost surely, 2^211411011421 is an apocalyptic number.

It is an amenable number.

211411011421 is a deficient number, since it is larger than the sum of its proper divisors (1634111).

211411011421 is a wasteful number, since it uses less digits than its factorization.

211411011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634110.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211411011421 its reverse (124110114112), we get a palindrome (335521125533).

The spelling of 211411011421 in words is "two hundred eleven billion, four hundred eleven million, eleven thousand, four hundred twenty-one".