202120102102210 has 8 divisors (see below), whose sum is σ = 363816183783996. Its totient is φ = 80848040840880.

The previous prime is 202120102102199. The next prime is 202120102102211. The reversal of 202120102102210 is 12201201021202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 191654702411481 + 10465399690729 = 13843941^2 + 3235027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×202120102102210² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202120102102211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10106005105101 + ... + 10106005105120.

Almost surely, 2^{202120102102210} is an apocalyptic number.

202120102102210 is a deficient number, since it is larger than the sum of its proper divisors (161696081681786).

202120102102210 is a wasteful number, since it uses less digits than its factorization.

202120102102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20212010210228.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202120102102210 its reverse (12201201021202), we get a palindrome (214321303123412).

The spelling of 202120102102210 in words is "two hundred two trillion, one hundred twenty billion, one hundred two million, one hundred two thousand, two hundred ten".