21442142001 has 32 divisors (see below), whose sum is σ = 33711759360. Its totient is φ = 11869251264.

The previous prime is 21442141979. The next prime is 21442142009. The reversal of 21442142001 is 10024124412.

It is not a de Polignac number, because 21442142001 - 2⁶ = 21442141937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21442142009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34005 + ... + 209858.

It is an arithmetic number, because the mean of its divisors is an integer number (1053492480).

Almost surely, 2^21442142001 is an apocalyptic number.

21442142001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21442142001 is a deficient number, since it is larger than the sum of its proper divisors (12269617359).

21442142001 is a wasteful number, since it uses less digits than its factorization.

21442142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244005.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21442142001 its reverse (10024124412), we get a palindrome (31466266413).

The spelling of 21442142001 in words is "twenty-one billion, four hundred forty-two million, one hundred forty-two thousand, one".