21442023402111 has 48 divisors (see below), whose sum is σ = 35327121657120. Its totient is φ = 12838467133440.

The previous prime is 21442023402047. The next prime is 21442023402227. The reversal of 21442023402111 is 11120432024412.

21442023402111 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 202 + 340 + 2 + 111 = 666.

It is not a de Polignac number, because 21442023402111 - 2⁶ = 21442023402047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442023402911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63332610 + ... + 63670271.

It is an arithmetic number, because the mean of its divisors is an integer number (735981701190).

Almost surely, 2^{21442023402111} is an apocalyptic number.

21442023402111 is a deficient number, since it is larger than the sum of its proper divisors (13885098255009).

21442023402111 is a wasteful number, since it uses less digits than its factorization.

21442023402111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127002953 (or 127002934 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21442023402111 its reverse (11120432024412), we get a palindrome (32562455426523).

The spelling of 21442023402111 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, one hundred eleven".