21120210122202 has 40 divisors (see below), whose sum is σ = 50108733825876. Its totient is φ = 6625948272768.

The previous prime is 21120210122177. The next prime is 21120210122213. The reversal of 21120210122202 is 20222101202112.

It is a happy number.

21120210122202 is a `hidden beast` number, since 211 + 20 + 210 + 1 + 2 + 220 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20515002363801 + 605207758401 = 4529349^2 + 777951^2 .

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 19 ways as a sum of consecutive naturals, for example, 3834458053 + ... + 3834463560.

Almost surely, 2^{21120210122202} is an apocalyptic number.

21120210122202 is an abundant number, since it is smaller than the sum of its proper divisors (28988523703674).

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

21120210122202 is a wasteful number, since it uses less digits than its factorization.

21120210122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668921644 (or 7668921635 counting only the distinct ones).

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

Adding to 21120210122202 its reverse (20222101202112), we get a palindrome (41342311324314).

The spelling of 21120210122202 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twenty-two thousand, two hundred two".