221211002140 has 48 divisors (see below), whose sum is σ = 465181280928. Its totient is φ = 88362952704.

The previous prime is 221211002071. The next prime is 221211002141. The reversal of 221211002140 is 41200112122.

221211002140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211002141) 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, 74656299 + ... + 74659261.

It is an arithmetic number, because the mean of its divisors is an integer number (9691276686).

Almost surely, 2^221211002140 is an apocalyptic number.

221211002140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211002140 is an abundant number, since it is smaller than the sum of its proper divisors (243970278788).

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

221211002140 is a wasteful number, since it uses less digits than its factorization.

221211002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6838 (or 6836 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221211002140 its reverse (41200112122), we get a palindrome (262411114262).

The spelling of 221211002140 in words is "two hundred twenty-one billion, two hundred eleven million, two thousand, one hundred forty".