21112102002 has 8 divisors (see below), whose sum is σ = 42224204016. Its totient is φ = 7037367332.

The previous prime is 21112101953. The next prime is 21112102007. The reversal of 21112102002 is 20020121112.

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

21112102002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21112102007) 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, 1759341828 + ... + 1759341839.

It is an arithmetic number, because the mean of its divisors is an integer number (5278025502).

Almost surely, 2^21112102002 is an apocalyptic number.

21112102002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21112102002 is a wasteful number, since it uses less digits than its factorization.

21112102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518683672.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21112102002 its reverse (20020121112), we get a palindrome (41132223114).

The spelling of 21112102002 in words is "twenty-one billion, one hundred twelve million, one hundred two thousand, two".