221412510552116 has 24 divisors (see below), whose sum is σ = 417279356119080. Its totient is φ = 102189916248192.

The previous prime is 221412510552109. The next prime is 221412510552127. The reversal of 221412510552116 is 611255015214122.

It can be written as a sum of positive squares in 4 ways, for example, as 2975638800016 + 218436871752100 = 1725004^2 + 14779610^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221412510552116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604630 + ... + 21104498.

It is an arithmetic number, because the mean of its divisors is an integer number (17386639838295).

Almost surely, 2^{221412510552116} is an apocalyptic number.

221412510552116 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221412510552116 is a deficient number, since it is larger than the sum of its proper divisors (195866845566964).

221412510552116 is a wasteful number, since it uses less digits than its factorization.

221412510552116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19718243 (or 19718241 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 38.

Adding to 221412510552116 its reverse (611255015214122), we get a palindrome (832667525766238).

The spelling of 221412510552116 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred ten million, five hundred fifty-two thousand, one hundred sixteen".