221423210424242 has 16 divisors (see below), whose sum is σ = 339205495875840. Its totient is φ = 108354767105088.

The previous prime is 221423210424139. The next prime is 221423210424253. The reversal of 221423210424242 is 242424012324122.

It is a happy number.

It is a super-2 number, since 2×221423210424242² (a number of 29 digits) contains 22 as substring.

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, 5751767 + ... + 21815802.

It is an arithmetic number, because the mean of its divisors is an integer number (21200343492240).

Almost surely, 2^{221423210424242} is an apocalyptic number.

221423210424242 is a deficient number, since it is larger than the sum of its proper divisors (117782285451598).

221423210424242 is a wasteful number, since it uses less digits than its factorization.

221423210424242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27653065.

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 221423210424242 its reverse (242424012324122), we get a palindrome (463847222748364).

The spelling of 221423210424242 in words is "two hundred twenty-one trillion, four hundred twenty-three billion, two hundred ten million, four hundred twenty-four thousand, two hundred forty-two".