211421023240 has 48 divisors (see below), whose sum is σ = 553362173100. Its totient is φ = 72487207296.

The previous prime is 211421023237. The next prime is 211421023249. The reversal of 211421023240 is 42320124112.

211421023240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 197941348836 + 13479674404 = 444906^2 + 116102^2 .

It is not an unprimeable number, because it can be changed into a prime (211421023249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53931975 + ... + 53935894.

Almost surely, 2^211421023240 is an apocalyptic number.

211421023240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211421023240 is an abundant number, since it is smaller than the sum of its proper divisors (341941149860).

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

211421023240 is a wasteful number, since it uses less digits than its factorization.

211421023240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107867894 (or 107867883 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 211421023240 its reverse (42320124112), we get a palindrome (253741147352).

The spelling of 211421023240 in words is "two hundred eleven billion, four hundred twenty-one million, twenty-three thousand, two hundred forty".