211421145011 has 4 divisors (see below), whose sum is σ = 211427521800. Its totient is φ = 211414768224.

The previous prime is 211421144947. The next prime is 211421145017. The reversal of 211421145011 is 110541124112.

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

It is a cyclic number.

It is not a de Polignac number, because 211421145011 - 2⁶ = 211421144947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211421145017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3138401 + ... + 3205058.

It is an arithmetic number, because the mean of its divisors is an integer number (52856880450).

Almost surely, 2^211421145011 is an apocalyptic number.

211421145011 is a deficient number, since it is larger than the sum of its proper divisors (6376789).

211421145011 is an equidigital number, since it uses as much as digits as its factorization.

211421145011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376788.

The product of its (nonzero) digits is 320, while the sum is 23.

Adding to 211421145011 its reverse (110541124112), we get a palindrome (321962269123).

The spelling of 211421145011 in words is "two hundred eleven billion, four hundred twenty-one million, one hundred forty-five thousand, eleven".