21330402162042 has 16 divisors (see below), whose sum is σ = 44515621903680. Its totient is φ = 6800997790752.

The previous prime is 21330402161983. The next prime is 21330402162053. The reversal of 21330402162042 is 24026120403312.

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, 77284065667 + ... + 77284065942.

It is an arithmetic number, because the mean of its divisors is an integer number (2782226368980).

Almost surely, 2^{21330402162042} is an apocalyptic number.

21330402162042 is an abundant number, since it is smaller than the sum of its proper divisors (23185219741638).

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

21330402162042 is a wasteful number, since it uses less digits than its factorization.

21330402162042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154568131637.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21330402162042 its reverse (24026120403312), we get a palindrome (45356522565354).

The spelling of 21330402162042 in words is "twenty-one trillion, three hundred thirty billion, four hundred two million, one hundred sixty-two thousand, forty-two".