221210031442 has 32 divisors (see below), whose sum is σ = 347434012800. Its totient is φ = 105432167808.

The previous prime is 221210031439. The next prime is 221210031457. The reversal of 221210031442 is 244130012122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44515534 + ... + 44520502.

It is an arithmetic number, because the mean of its divisors is an integer number (10857312900).

Almost surely, 2^221210031442 is an apocalyptic number.

221210031442 is a deficient number, since it is larger than the sum of its proper divisors (126223981358).

221210031442 is a wasteful number, since it uses less digits than its factorization.

221210031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221210031442 its reverse (244130012122), we get a palindrome (465340043564).

The spelling of 221210031442 in words is "two hundred twenty-one billion, two hundred ten million, thirty-one thousand, four hundred forty-two".