221005541121542 has 16 divisors (see below), whose sum is σ = 351010250130960. Its totient is φ = 104002178097408.

The previous prime is 221005541121529. The next prime is 221005541121583. The reversal of 221005541121542 is 245121145500122.

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, 4990463 + ... + 21608234.

It is an arithmetic number, because the mean of its divisors is an integer number (21938140633185).

Almost surely, 2^{221005541121542} is an apocalyptic number.

221005541121542 is a deficient number, since it is larger than the sum of its proper divisors (130004709009418).

221005541121542 is a wasteful number, since it uses less digits than its factorization.

221005541121542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843095.

The product of its (nonzero) digits is 32000, while the sum is 35.

Adding to 221005541121542 its reverse (245121145500122), we get a palindrome (466126686621664).

The spelling of 221005541121542 in words is "two hundred twenty-one trillion, five billion, five hundred forty-one million, one hundred twenty-one thousand, five hundred forty-two".