21131102414242 has 8 divisors (see below), whose sum is σ = 31697875950876. Its totient is φ = 10565143763952.

The previous prime is 21131102414237. The next prime is 21131102414243. The reversal of 21131102414242 is 24241420113112.

It can be written as a sum of positive squares in 2 ways, for example, as 20443067002801 + 688035411441 = 4521401^2 + 829479^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21131102414242.

It is not an unprimeable number, because it can be changed into a prime (21131102414243) 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, 203656753 + ... + 203760484.

Almost surely, 2^{21131102414242} is an apocalyptic number.

21131102414242 is a deficient number, since it is larger than the sum of its proper divisors (10566773536634).

21131102414242 is a wasteful number, since it uses less digits than its factorization.

21131102414242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407443172.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21131102414242 its reverse (24241420113112), we get a palindrome (45372522527354).

The spelling of 21131102414242 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred two million, four hundred fourteen thousand, two hundred forty-two".