20201212010121 has 4 divisors (see below), whose sum is σ = 26934949346832. Its totient is φ = 13467474673412.

The previous prime is 20201212010113. The next prime is 20201212010141. The reversal of 20201212010121 is 12101021210202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20201212010121 - 2³ = 20201212010113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20201212010121.

It is not an unprimeable number, because it can be changed into a prime (20201212010141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366868668351 + ... + 3366868668356.

It is an arithmetic number, because the mean of its divisors is an integer number (6733737336708).

Almost surely, 2^{20201212010121} is an apocalyptic number.

It is an amenable number.

20201212010121 is a deficient number, since it is larger than the sum of its proper divisors (6733737336711).

20201212010121 is an equidigital number, since it uses as much as digits as its factorization.

20201212010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733737336710.

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

Adding to 20201212010121 its reverse (12101021210202), we get a palindrome (32302233220323).

The spelling of 20201212010121 in words is "twenty trillion, two hundred one billion, two hundred twelve million, ten thousand, one hundred twenty-one".