221420234442042 has 12 divisors (see below), whose sum is σ = 479743841291130. Its totient is φ = 73806744814008.

The previous prime is 221420234441957. The next prime is 221420234442053. The reversal of 221420234442042 is 240244432024122.

221420234442042 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 2 + 0 + 2 + 3 + 444 + 204 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 191911122533601 + 29509111908441 = 13853199^2 + 5432229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221420234441988 and 221420234442006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6150562067817 + ... + 6150562067852.

Almost surely, 2^{221420234442042} is an apocalyptic number.

221420234442042 is an abundant number, since it is smaller than the sum of its proper divisors (258323606849088).

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

221420234442042 is a wasteful number, since it uses less digits than its factorization.

221420234442042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12301124135677 (or 12301124135674 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 36.

Adding to 221420234442042 its reverse (240244432024122), we get a palindrome (461664666466164).

The spelling of 221420234442042 in words is "two hundred twenty-one trillion, four hundred twenty billion, two hundred thirty-four million, four hundred forty-two thousand, forty-two".