21111120021202 has 8 divisors (see below), whose sum is σ = 31674090922236. Its totient is φ = 10553089713792.

The previous prime is 21111120021163. The next prime is 21111120021289. The reversal of 21111120021202 is 20212002111112.

It can be written as a sum of positive squares in 2 ways, for example, as 20972818592881 + 138301428321 = 4579609^2 + 371889^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235137723 + ... + 1235154814.

Almost surely, 2^{21111120021202} is an apocalyptic number.

21111120021202 is a deficient number, since it is larger than the sum of its proper divisors (10562970901034).

21111120021202 is a wasteful number, since it uses less digits than its factorization.

21111120021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470296812.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21111120021202 its reverse (20212002111112), we get a palindrome (41323122132314).

The spelling of 21111120021202 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty million, twenty-one thousand, two hundred two".