21000221011002 has 32 divisors (see below), whose sum is σ = 42983539822080. Its totient is φ = 6836272092720.

The previous prime is 21000221010991. The next prime is 21000221011009. The reversal of 21000221011002 is 20011012200012.

It is not an unprimeable number, because it can be changed into a prime (21000221011009) 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, 4254574 + ... + 7752537.

It is an arithmetic number, because the mean of its divisors is an integer number (1343235619440).

Almost surely, 2^{21000221011002} is an apocalyptic number.

21000221011002 is an abundant number, since it is smaller than the sum of its proper divisors (21983318811078).

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

21000221011002 is a wasteful number, since it uses less digits than its factorization.

21000221011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12013938.

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

Adding to 21000221011002 its reverse (20011012200012), we get a palindrome (41011233211014).

The spelling of 21000221011002 in words is "twenty-one trillion, two hundred twenty-one million, eleven thousand, two".