221243012013140 has 96 divisors (see below), whose sum is σ = 513879612372000. Its totient is φ = 79480803557376.

The previous prime is 221243012013131. The next prime is 221243012013143. The reversal of 221243012013140 is 41310210342122.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 137594354523844 + 83648657489296 = 11730062^2 + 9145964^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221243012013143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1088430236 + ... + 1088633484.

It is an arithmetic number, because the mean of its divisors is an integer number (5352912628875).

Almost surely, 2^{221243012013140} is an apocalyptic number.

221243012013140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221243012013140 is an abundant number, since it is smaller than the sum of its proper divisors (292636600358860).

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

221243012013140 is a wasteful number, since it uses less digits than its factorization.

221243012013140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316461 (or 316459 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 221243012013140 its reverse (41310210342122), we get a palindrome (262553222355262).

The spelling of 221243012013140 in words is "two hundred twenty-one trillion, two hundred forty-three billion, twelve million, thirteen thousand, one hundred forty".