211420303240 has 32 divisors (see below), whose sum is σ = 477504434880. Its totient is φ = 84246565312.

The previous prime is 211420303223. The next prime is 211420303249. The reversal of 211420303240 is 42303024112.

It is not an unprimeable number, because it can be changed into a prime (211420303249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10037974 + ... + 10059013.

It is an arithmetic number, because the mean of its divisors is an integer number (14922013590).

Almost surely, 2^211420303240 is an apocalyptic number.

211420303240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211420303240 is an abundant number, since it is smaller than the sum of its proper divisors (266084131640).

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

211420303240 is a wasteful number, since it uses less digits than its factorization.

211420303240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20097261 (or 20097257 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 211420303240 its reverse (42303024112), we get a palindrome (253723327352).

The spelling of 211420303240 in words is "two hundred eleven billion, four hundred twenty million, three hundred three thousand, two hundred forty".