20210121223210 has 16 divisors (see below), whose sum is σ = 36381092133600. Its totient is φ = 8083409837776.

The previous prime is 20210121223177. The next prime is 20210121223211. The reversal of 20210121223210 is 1232212101202.

It is not an unprimeable number, because it can be changed into a prime (20210121223211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79698520 + ... + 79951699.

It is an arithmetic number, because the mean of its divisors is an integer number (2273818258350).

Almost surely, 2^{20210121223210} is an apocalyptic number.

20210121223210 is a deficient number, since it is larger than the sum of its proper divisors (16170970910390).

20210121223210 is a wasteful number, since it uses less digits than its factorization.

20210121223210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159662885.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20210121223210 its reverse (1232212101202), we get a palindrome (21442333324412).

The spelling of 20210121223210 in words is "twenty trillion, two hundred ten billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred ten".