201021111442 has 8 divisors (see below), whose sum is σ = 311258495232. Its totient is φ = 97268279700.

The previous prime is 201021111433. The next prime is 201021111463. The reversal of 201021111442 is 244111120102.

It is a happy number.

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, 1621137934 + ... + 1621138057.

It is an arithmetic number, because the mean of its divisors is an integer number (38907311904).

Almost surely, 2^201021111442 is an apocalyptic number.

201021111442 is a deficient number, since it is larger than the sum of its proper divisors (110237383790).

201021111442 is a wasteful number, since it uses less digits than its factorization.

201021111442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242276024.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201021111442 its reverse (244111120102), we get a palindrome (445132231544).

The spelling of 201021111442 in words is "two hundred one billion, twenty-one million, one hundred eleven thousand, four hundred forty-two".