21301420131442 has 16 divisors (see below), whose sum is σ = 34884122572800. Its totient is φ = 9674893344240.

The previous prime is 21301420131379. The next prime is 21301420131449. The reversal of 21301420131442 is 24413102410312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21301420131442.

It is not an unprimeable number, because it can be changed into a prime (21301420131449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378488817 + ... + 378545092.

It is an arithmetic number, because the mean of its divisors is an integer number (2180257660800).

Almost surely, 2^{21301420131442} is an apocalyptic number.

21301420131442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21301420131442 is a deficient number, since it is larger than the sum of its proper divisors (13582702441358).

21301420131442 is a wasteful number, since it uses less digits than its factorization.

21301420131442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757035201.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21301420131442 its reverse (24413102410312), we get a palindrome (45714522541754).

The spelling of 21301420131442 in words is "twenty-one trillion, three hundred one billion, four hundred twenty million, one hundred thirty-one thousand, four hundred forty-two".