21002100221202 has 16 divisors (see below), whose sum is σ = 42631128808032. Its totient is φ = 6896212012800.

The previous prime is 21002100221171. The next prime is 21002100221233. The reversal of 21002100221202 is 20212200120012.

It is an interprime number because it is at equal distance from previous prime (21002100221171) and next prime (21002100221233).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26122014799 + ... + 26122015602.

It is an arithmetic number, because the mean of its divisors is an integer number (2664445550502).

Almost surely, 2^{21002100221202} is an apocalyptic number.

21002100221202 is an abundant number, since it is smaller than the sum of its proper divisors (21629028586830).

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

21002100221202 is a wasteful number, since it uses less digits than its factorization.

21002100221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52244030473.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21002100221202 its reverse (20212200120012), we get a palindrome (41214300341214).

The spelling of 21002100221202 in words is "twenty-one trillion, two billion, one hundred million, two hundred twenty-one thousand, two hundred two".