21010241442 has 16 divisors (see below), whose sum is σ = 42252642432. Its totient is φ = 6964720560.

The previous prime is 21010241429. The next prime is 21010241459. The reversal of 21010241442 is 24414201012.

It is a super-2 number, since 2×21010241442² (a number of 21 digits) contains 22 as substring.

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, 9672138 + ... + 9674309.

It is an arithmetic number, because the mean of its divisors is an integer number (2640790152).

Almost surely, 2^21010241442 is an apocalyptic number.

21010241442 is an abundant number, since it is smaller than the sum of its proper divisors (21242400990).

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

21010241442 is a wasteful number, since it uses less digits than its factorization.

21010241442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19346633.

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

Adding to 21010241442 its reverse (24414201012), we get a palindrome (45424442454).

The spelling of 21010241442 in words is "twenty-one billion, ten million, two hundred forty-one thousand, four hundred forty-two".