221102142 has 16 divisors (see below), whose sum is σ = 442364160. Its totient is φ = 73674072.

The previous prime is 221102117. The next prime is 221102191. The reversal of 221102142 is 241201122.

221102142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 18813 + ... + 28215.

It is an arithmetic number, because the mean of its divisors is an integer number (27647760).

Almost surely, 2^221102142 is an apocalyptic number.

221102142 is an abundant number, since it is smaller than the sum of its proper divisors (221262018).

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

221102142 is a wasteful number, since it uses less digits than its factorization.

221102142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13327.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221102142 is about 14869.5037576914. The cubic root of 221102142 is about 604.6874892628.

Adding to 221102142 its reverse (241201122), we get a palindrome (462303264).

The spelling of 221102142 in words is "two hundred twenty-one million, one hundred two thousand, one hundred forty-two".