20102121201210 has 16 divisors (see below), whose sum is σ = 48245090882976. Its totient is φ = 5360565653648.

The previous prime is 20102121201187. The next prime is 20102121201271. The reversal of 20102121201210 is 1210212120102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20102121201210.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335035353324 + ... + 335035353383.

It is an arithmetic number, because the mean of its divisors is an integer number (3015318180186).

Almost surely, 2^{20102121201210} is an apocalyptic number.

20102121201210 is an abundant number, since it is smaller than the sum of its proper divisors (28142969681766).

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

20102121201210 is a wasteful number, since it uses less digits than its factorization.

20102121201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670070706717.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20102121201210 its reverse (1210212120102), we get a palindrome (21312333321312).

The spelling of 20102121201210 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred one thousand, two hundred ten".