20210121001210 has 128 divisors (see below), whose sum is σ = 44354753888256. Its totient is φ = 6472220267520.

The previous prime is 20210121001181. The next prime is 20210121001219. The reversal of 20210121001210 is 1210012101202.

It is not an unprimeable number, because it can be changed into a prime (20210121001219) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 125318047 + ... + 125479213.

It is an arithmetic number, because the mean of its divisors is an integer number (346521514752).

Almost surely, 2^{20210121001210} is an apocalyptic number.

20210121001210 is an abundant number, since it is smaller than the sum of its proper divisors (24144632887046).

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

20210121001210 is a wasteful number, since it uses less digits than its factorization.

20210121001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161996.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20210121001210 its reverse (1210012101202), we get a palindrome (21420133102412).

The spelling of 20210121001210 in words is "twenty trillion, two hundred ten billion, one hundred twenty-one million, one thousand, two hundred ten".