20201210121121 has 32 divisors (see below), whose sum is σ = 23220894302208. Its totient is φ = 17461021374720.

The previous prime is 20201210121049. The next prime is 20201210121179. The reversal of 20201210121121 is 12112101210202.

It is a cyclic number.

It is not a de Polignac number, because 20201210121121 - 2¹⁹ = 20201209596833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201210121095 and 20201210121104.

It is not an unprimeable number, because it can be changed into a prime (20201210121181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5022165 + ... + 8100898.

It is an arithmetic number, because the mean of its divisors is an integer number (725652946944).

Almost surely, 2^{20201210121121} is an apocalyptic number.

It is an amenable number.

20201210121121 is a deficient number, since it is larger than the sum of its proper divisors (3019684181087).

20201210121121 is a wasteful number, since it uses less digits than its factorization.

20201210121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13123261.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20201210121121 its reverse (12112101210202), we get a palindrome (32313311331323).

The spelling of 20201210121121 in words is "twenty trillion, two hundred one billion, two hundred ten million, one hundred twenty-one thousand, one hundred twenty-one".