21122411442 has 32 divisors (see below), whose sum is σ = 46437076224. Its totient is φ = 6351867600.

The previous prime is 21122411437. The next prime is 21122411449. The reversal of 21122411442 is 24411422112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21122411449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212868 + ... + 1230159.

It is an arithmetic number, because the mean of its divisors is an integer number (1451158632).

Almost surely, 2^21122411442 is an apocalyptic number.

21122411442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122411442 is an abundant number, since it is smaller than the sum of its proper divisors (25314664782).

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

21122411442 is a wasteful number, since it uses less digits than its factorization.

21122411442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443174.

The product of its digits is 1024, while the sum is 24.

Adding to 21122411442 its reverse (24411422112), we get a palindrome (45533833554).

The spelling of 21122411442 in words is "twenty-one billion, one hundred twenty-two million, four hundred eleven thousand, four hundred forty-two".