221400413012 has 6 divisors (see below), whose sum is σ = 387450722778. Its totient is φ = 110700206504.

The previous prime is 221400412991. The next prime is 221400413071. The reversal of 221400413012 is 210314004122.

It can be written as a sum of positive squares in only one way, i.e., 220837964356 + 562448656 = 469934^2 + 23716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27675051623 + ... + 27675051630.

It is an arithmetic number, because the mean of its divisors is an integer number (64575120463).

Almost surely, 2^221400413012 is an apocalyptic number.

It is an amenable number.

221400413012 is a deficient number, since it is larger than the sum of its proper divisors (166050309766).

221400413012 is a wasteful number, since it uses less digits than its factorization.

221400413012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55350103257 (or 55350103255 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221400413012 its reverse (210314004122), we get a palindrome (431714417134).

The spelling of 221400413012 in words is "two hundred twenty-one billion, four hundred million, four hundred thirteen thousand, twelve".