20201201022121 has 32 divisors (see below), whose sum is σ = 23428796878080. Its totient is φ = 17061070093056.

The previous prime is 20201201022103. The next prime is 20201201022127. The reversal of 20201201022121 is 12122010210202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20201201022121 - 2¹⁵ = 20201200989353 is a prime.

It is a super-2 number, since 2×20201201022121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201201022095 and 20201201022104.

It is not an unprimeable number, because it can be changed into a prime (20201201022127) 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, 98653575 + ... + 98858131.

It is an arithmetic number, because the mean of its divisors is an integer number (732149902440).

Almost surely, 2^{20201201022121} is an apocalyptic number.

It is an amenable number.

20201201022121 is a deficient number, since it is larger than the sum of its proper divisors (3227595855959).

20201201022121 is a wasteful number, since it uses less digits than its factorization.

20201201022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205393.

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

Adding to 20201201022121 its reverse (12122010210202), we get a palindrome (32323211232323).

The spelling of 20201201022121 in words is "twenty trillion, two hundred one billion, two hundred one million, twenty-two thousand, one hundred twenty-one".