21223440001042 has 4 divisors (see below), whose sum is σ = 31835160001566. Its totient is φ = 10611720000520.

The previous prime is 21223440000901. The next prime is 21223440001051. The reversal of 21223440001042 is 24010004432212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11564155173321 + 9659284827721 = 3400611^2 + 3107939^2 .

It is a super-2 number, since 2×21223440001042² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21223440000998 and 21223440001016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305860000259 + ... + 5305860000262.

Almost surely, 2^{21223440001042} is an apocalyptic number.

21223440001042 is a deficient number, since it is larger than the sum of its proper divisors (10611720000524).

21223440001042 is a wasteful number, since it uses less digits than its factorization.

21223440001042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10611720000523.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21223440001042 its reverse (24010004432212), we get a palindrome (45233444433254).

The spelling of 21223440001042 in words is "twenty-one trillion, two hundred twenty-three billion, four hundred forty million, one thousand, forty-two".