21202212211002 has 16 divisors (see below), whose sum is σ = 47116027135680. Its totient is φ = 7067404070316.

The previous prime is 21202212210989. The next prime is 21202212211003. The reversal of 21202212211002 is 20011221220212.

It is a happy number.

21202212211002 is a `hidden beast` number, since 2 + 120 + 221 + 221 + 100 + 2 = 666.

It is a super-3 number, since 3×21202212211002³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21202212211003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196316779678 + ... + 196316779785.

It is an arithmetic number, because the mean of its divisors is an integer number (2944751695980).

Almost surely, 2^{21202212211002} is an apocalyptic number.

21202212211002 is an abundant number, since it is smaller than the sum of its proper divisors (25913814924678).

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

21202212211002 is a wasteful number, since it uses less digits than its factorization.

21202212211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392633559474 (or 392633559468 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21202212211002 its reverse (20011221220212), we get a palindrome (41213433431214).

The spelling of 21202212211002 in words is "twenty-one trillion, two hundred two billion, two hundred twelve million, two hundred eleven thousand, two".