21211221101002 has 96 divisors (see below), whose sum is σ = 34436525421312. Its totient is φ = 9789668064000.

The previous prime is 21211221100991. The next prime is 21211221101047. The reversal of 21211221101002 is 20010112211212.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 802742763 + ... + 802769185.

It is an arithmetic number, because the mean of its divisors is an integer number (358713806472).

Almost surely, 2^{21211221101002} is an apocalyptic number.

21211221101002 is a deficient number, since it is larger than the sum of its proper divisors (13225304320310).

21211221101002 is a wasteful number, since it uses less digits than its factorization.

21211221101002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26756 (or 26725 counting only the distinct ones).

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

Adding to 21211221101002 its reverse (20010112211212), we get a palindrome (41221333312214).

The spelling of 21211221101002 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-one million, one hundred one thousand, two".