211023421 has 8 divisors (see below), whose sum is σ = 242314304. Its totient is φ = 180018720.

The previous prime is 211023419. The next prime is 211023427. The reversal of 211023421 is 124320112.

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

It is not a de Polignac number, because 211023421 - 2¹ = 211023419 is a prime.

It is a Duffinian number.

211023421 is a modest number, since divided by 23421 gives 211 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 211023395 and 211023404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211023427) 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 7 ways as a sum of consecutive naturals, for example, 69960 + ... + 72913.

It is an arithmetic number, because the mean of its divisors is an integer number (30289288).

Almost surely, 2^211023421 is an apocalyptic number.

It is an amenable number.

211023421 is a deficient number, since it is larger than the sum of its proper divisors (31290883).

211023421 is a wasteful number, since it uses less digits than its factorization.

211023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143091.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211023421 is about 14526.6452080307. The cubic root of 211023421 is about 595.3562078637.

Adding to 211023421 its reverse (124320112), we get a palindrome (335343533).

The spelling of 211023421 in words is "two hundred eleven million, twenty-three thousand, four hundred twenty-one".