21225342112242 has 32 divisors (see below), whose sum is σ = 43985675376000. Its totient is φ = 6820073006208.

The previous prime is 21225342112231. The next prime is 21225342112279. The reversal of 21225342112242 is 24221124352212.

It is a happy number.

It is a super-2 number, since 2×21225342112242² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98745742 + ... + 98960457.

It is an arithmetic number, because the mean of its divisors is an integer number (1374552355500).

Almost surely, 2^{21225342112242} is an apocalyptic number.

21225342112242 is an abundant number, since it is smaller than the sum of its proper divisors (22760333263758).

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

21225342112242 is a wasteful number, since it uses less digits than its factorization.

21225342112242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197706850.

The product of its digits is 30720, while the sum is 33.

Adding to 21225342112242 its reverse (24221124352212), we get a palindrome (45446466464454).

The spelling of 21225342112242 in words is "twenty-one trillion, two hundred twenty-five billion, three hundred forty-two million, one hundred twelve thousand, two hundred forty-two".