21214201542 has 32 divisors (see below), whose sum is σ = 44539407360. Its totient is φ = 6727299360.

The previous prime is 21214201531. The next prime is 21214201543. The reversal of 21214201542 is 24510241212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214201543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955593 + ... + 977540.

It is an arithmetic number, because the mean of its divisors is an integer number (1391856480).

Almost surely, 2^21214201542 is an apocalyptic number.

21214201542 is an abundant number, since it is smaller than the sum of its proper divisors (23325205818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214201542 is a wasteful number, since it uses less digits than its factorization.

21214201542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933228.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 21214201542 its reverse (24510241212), we get a palindrome (45724442754).

The spelling of 21214201542 in words is "twenty-one billion, two hundred fourteen million, two hundred one thousand, five hundred forty-two".