20201212020121 has 16 divisors (see below), whose sum is σ = 22166993873088. Its totient is φ = 18256999924800.

The previous prime is 20201212020113. The next prime is 20201212020131. The reversal of 20201212020121 is 12102021210202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20201212020121 - 2³ = 20201212020113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201212020095 and 20201212020104.

It is not an unprimeable number, because it can be changed into a prime (20201212020131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21766786 + ... + 22675876.

It is an arithmetic number, because the mean of its divisors is an integer number (1385437117068).

Almost surely, 2^{20201212020121} is an apocalyptic number.

It is an amenable number.

20201212020121 is a deficient number, since it is larger than the sum of its proper divisors (1965781852967).

20201212020121 is a wasteful number, since it uses less digits than its factorization.

20201212020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920952.

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

Adding to 20201212020121 its reverse (12102021210202), we get a palindrome (32303233230323).

The spelling of 20201212020121 in words is "twenty trillion, two hundred one billion, two hundred twelve million, twenty thousand, one hundred twenty-one".