21002002232242 has 8 divisors (see below), whose sum is σ = 31781790988956. Its totient is φ = 10408071902592.

The previous prime is 21002002232191. The next prime is 21002002232243. The reversal of 21002002232242 is 24223220020012.

It can be written as a sum of positive squares in 2 ways, for example, as 20951574589521 + 50427642721 = 4577289^2 + 224561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21002002232243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46464606483 + ... + 46464606934.

Almost surely, 2^{21002002232242} is an apocalyptic number.

21002002232242 is a deficient number, since it is larger than the sum of its proper divisors (10779788756714).

21002002232242 is a wasteful number, since it uses less digits than its factorization.

21002002232242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92929213532.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21002002232242 its reverse (24223220020012), we get a palindrome (45225222252254).

The spelling of 21002002232242 in words is "twenty-one trillion, two billion, two million, two hundred thirty-two thousand, two hundred forty-two".