221131304043340 has 24 divisors (see below), whose sum is σ = 468032240374272. Its totient is φ = 87756045068160.

The previous prime is 221131304043277. The next prime is 221131304043341. The reversal of 221131304043340 is 43340403131122.

It is not an unprimeable number, because it can be changed into a prime (221131304043341) 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, 43529781721 + ... + 43529786800.

It is an arithmetic number, because the mean of its divisors is an integer number (19501343348928).

Almost surely, 2^{221131304043340} is an apocalyptic number.

221131304043340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221131304043340 is an abundant number, since it is smaller than the sum of its proper divisors (246900936330932).

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

221131304043340 is a wasteful number, since it uses less digits than its factorization.

221131304043340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87059568657 (or 87059568655 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 221131304043340 its reverse (43340403131122), we get a palindrome (264471707174462).

The spelling of 221131304043340 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, three hundred four million, forty-three thousand, three hundred forty".