221123120401142 has 4 divisors (see below), whose sum is σ = 331684680601716. Its totient is φ = 110561560200570.

The previous prime is 221123120401111. The next prime is 221123120401147. The reversal of 221123120401142 is 241104021321122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221123120401147) by changing a digit.

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 as a sum of consecutive naturals, namely, 55280780100284 + ... + 55280780100287.

It is an arithmetic number, because the mean of its divisors is an integer number (82921170150429).

Almost surely, 2^{221123120401142} is an apocalyptic number.

221123120401142 is a deficient number, since it is larger than the sum of its proper divisors (110561560200574).

221123120401142 is a wasteful number, since it uses less digits than its factorization.

221123120401142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110561560200573.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 221123120401142 its reverse (241104021321122), we get a palindrome (462227141722264).

The spelling of 221123120401142 in words is "two hundred twenty-one trillion, one hundred twenty-three billion, one hundred twenty million, four hundred one thousand, one hundred forty-two".