21002111220012 has 48 divisors (see below), whose sum is σ = 52926624022272. Its totient is φ = 6443565030720.

The previous prime is 21002111220001. The next prime is 21002111220019. The reversal of 21002111220012 is 21002211120012.

It is a junction number, because it is equal to n+sod(n) for n = 21002111219973 and 21002111220000.

It is not an unprimeable number, because it can be changed into a prime (21002111220019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193935664 + ... + 194043927.

It is an arithmetic number, because the mean of its divisors is an integer number (1102638000464).

Almost surely, 2^{21002111220012} is an apocalyptic number.

It is an amenable number.

21002111220012 is an abundant number, since it is smaller than the sum of its proper divisors (31924512802260).

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

21002111220012 is a wasteful number, since it uses less digits than its factorization.

21002111220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387979958 (or 387979956 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21002111220012 its reverse (21002211120012), we get a palindrome (42004322340024).

The spelling of 21002111220012 in words is "twenty-one trillion, two billion, one hundred eleven million, two hundred twenty thousand, twelve".