20102121211210 has 16 divisors (see below), whose sum is σ = 37431536049000. Its totient is φ = 7763577846976.

The previous prime is 20102121211199. The next prime is 20102121211231. The reversal of 20102121211210 is 1211212120102.

It can be written as a sum of positive squares in 4 ways, for example, as 13056276542409 + 7045844668801 = 3613347^2 + 2654401^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34658829385 + ... + 34658829964.

Almost surely, 2^{20102121211210} is an apocalyptic number.

20102121211210 is a deficient number, since it is larger than the sum of its proper divisors (17329414837790).

20102121211210 is a wasteful number, since it uses less digits than its factorization.

20102121211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69317659385.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20102121211210 its reverse (1211212120102), we get a palindrome (21313333331312).

The spelling of 20102121211210 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred ten".