21212211002202 has 64 divisors (see below), whose sum is σ = 53659348024320. Its totient is φ = 6148466953200.

The previous prime is 21212211002197. The next prime is 21212211002219. The reversal of 21212211002202 is 20220011221212.

It is a happy number.

21212211002202 is a `hidden beast` number, since 2 + 121 + 221 + 100 + 220 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 776307924 + ... + 776335247.

It is an arithmetic number, because the mean of its divisors is an integer number (838427312880).

Almost surely, 2^{21212211002202} is an apocalyptic number.

21212211002202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21212211002202 is an abundant number, since it is smaller than the sum of its proper divisors (32447137022118).

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

21212211002202 is a wasteful number, since it uses less digits than its factorization.

21212211002202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552643216 (or 1552643210 counting only the distinct ones).

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

Adding to 21212211002202 its reverse (20220011221212), we get a palindrome (41432222223414).

The spelling of 21212211002202 in words is "twenty-one trillion, two hundred twelve billion, two hundred eleven million, two thousand, two hundred two".