21021110211002 has 24 divisors (see below), whose sum is σ = 34664455890036. Its totient is φ = 9553483280000.

The previous prime is 21021110210993. The next prime is 21021110211041. The reversal of 21021110211002 is 20011201112012.

It can be written as a sum of positive squares in 2 ways, for example, as 19357967253361 + 1663142957641 = 4399769^2 + 1289629^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5642399 + ... + 8595282.

Almost surely, 2^{21021110211002} is an apocalyptic number.

21021110211002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021110211002 is a deficient number, since it is larger than the sum of its proper divisors (13643345679034).

21021110211002 is a wasteful number, since it uses less digits than its factorization.

21021110211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243806 (or 14243795 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021110211002 its reverse (20011201112012), we get a palindrome (41032311323014).

The spelling of 21021110211002 in words is "twenty-one trillion, twenty-one billion, one hundred ten million, two hundred eleven thousand, two".