20120121210202 has 24 divisors (see below), whose sum is σ = 32771346936480. Its totient is φ = 9260342853840.

The previous prime is 20120121210127. The next prime is 20120121210229. The reversal of 20120121210202 is 20201212102102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82785324 + ... + 83028007.

It is an arithmetic number, because the mean of its divisors is an integer number (1365472789020).

Almost surely, 2^{20120121210202} is an apocalyptic number.

20120121210202 is a deficient number, since it is larger than the sum of its proper divisors (12651225726278).

20120121210202 is a wasteful number, since it uses less digits than its factorization.

20120121210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165813718 (or 165813705 counting only the distinct ones).

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

Adding to 20120121210202 its reverse (20201212102102), we get a palindrome (40321333312304).

The spelling of 20120121210202 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, two hundred two".