20212102121202 has 12 divisors (see below), whose sum is σ = 43792887929310. Its totient is φ = 6737367373728.

The previous prime is 20212102121147. The next prime is 20212102121221. The reversal of 20212102121202 is 20212120121202.

It is a happy number.

20212102121202 is a `hidden beast` number, since 20 + 21 + 210 + 212 + 1 + 202 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19956956917041 + 255145204161 = 4467321^2 + 505119^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1122894562289 = 20212102121202 / (2 + 0 + 2 + 1 + 2 + 1 + 0 + 2 + 1 + 2 + 1 + 2 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561447281127 + ... + 561447281162.

Almost surely, 2^{20212102121202} is an apocalyptic number.

20212102121202 is an abundant number, since it is smaller than the sum of its proper divisors (23580785808108).

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

20212102121202 is a wasteful number, since it uses less digits than its factorization.

20212102121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122894562297 (or 1122894562294 counting only the distinct ones).

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

Adding to 20212102121202 its reverse (20212120121202), we get a palindrome (40424222242404).

The spelling of 20212102121202 in words is "twenty trillion, two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, two hundred two".