21214205243042 has 16 divisors (see below), whose sum is σ = 36367851734592. Its totient is φ = 9091641560400.

The previous prime is 21214205242973. The next prime is 21214205243051. The reversal of 21214205243042 is 24034250241212.

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, 12568388 + ... + 14156015.

It is an arithmetic number, because the mean of its divisors is an integer number (2272990733412).

Almost surely, 2^{21214205243042} is an apocalyptic number.

21214205243042 is a deficient number, since it is larger than the sum of its proper divisors (15153646491550).

21214205243042 is a wasteful number, since it uses less digits than its factorization.

21214205243042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26781113.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 21214205243042 its reverse (24034250241212), we get a palindrome (45248455484254).

The spelling of 21214205243042 in words is "twenty-one trillion, two hundred fourteen billion, two hundred five million, two hundred forty-three thousand, forty-two".