221544021040442 has 8 divisors (see below), whose sum is σ = 334172545704000. Its totient is φ = 110153172472444.

The previous prime is 221544021040399. The next prime is 221544021040483. The reversal of 221544021040442 is 244040120445122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309419023442 + ... + 309419024157.

It is an arithmetic number, because the mean of its divisors is an integer number (41771568213000).

Almost surely, 2^{221544021040442} is an apocalyptic number.

221544021040442 is a deficient number, since it is larger than the sum of its proper divisors (112628524663558).

221544021040442 is a wasteful number, since it uses less digits than its factorization.

221544021040442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618838047780.

The product of its (nonzero) digits is 81920, while the sum is 35.

Adding to 221544021040442 its reverse (244040120445122), we get a palindrome (465584141485564).

The spelling of 221544021040442 in words is "two hundred twenty-one trillion, five hundred forty-four billion, twenty-one million, forty thousand, four hundred forty-two".