221212001140 has 96 divisors (see below), whose sum is σ = 504121395456. Its totient is φ = 81052185600.

The previous prime is 221212001111. The next prime is 221212001173. The reversal of 221212001140 is 41100212122.

It is a super-2 number, since 2×221212001140² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46834819 + ... + 46839541.

It is an arithmetic number, because the mean of its divisors is an integer number (5251264536).

Almost surely, 2^221212001140 is an apocalyptic number.

221212001140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221212001140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252060697728).

221212001140 is an abundant number, since it is smaller than the sum of its proper divisors (282909394316).

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

221212001140 is a wasteful number, since it uses less digits than its factorization.

221212001140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089 (or 6087 counting only the distinct ones).

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

Adding to 221212001140 its reverse (41100212122), we get a palindrome (262312213262).

The spelling of 221212001140 in words is "two hundred twenty-one billion, two hundred twelve million, one thousand, one hundred forty".