211013421 has 16 divisors (see below), whose sum is σ = 284903424. Its totient is φ = 138910464.

The previous prime is 211013417. The next prime is 211013423. The reversal of 211013421 is 124310112.

It is not a de Polignac number, because 211013421 - 2² = 211013417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211013421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211013423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87585 + ... + 89961.

It is an arithmetic number, because the mean of its divisors is an integer number (17806464).

Almost surely, 2^211013421 is an apocalyptic number.

It is an amenable number.

211013421 is a deficient number, since it is larger than the sum of its proper divisors (73890003).

211013421 is a wasteful number, since it uses less digits than its factorization.

211013421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 211013421 is about 14526.3010088598. The cubic root of 211013421 is about 595.3468034476.

Adding to 211013421 its reverse (124310112), we get a palindrome (335323533).

The spelling of 211013421 in words is "two hundred eleven million, thirteen thousand, four hundred twenty-one".