20201202121 has 8 divisors (see below), whose sum is σ = 20587815360. Its totient is φ = 19814791152.

The previous prime is 20201202107. The next prime is 20201202139. The reversal of 20201202121 is 12120210202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20201202121 - 2²³ = 20192813513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201202821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159340 + ... + 256498.

It is an arithmetic number, because the mean of its divisors is an integer number (2573476920).

Almost surely, 2^20201202121 is an apocalyptic number.

It is an amenable number.

20201202121 is a deficient number, since it is larger than the sum of its proper divisors (386613239).

20201202121 is an equidigital number, since it uses as much as digits as its factorization.

20201202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101135.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20201202121 its reverse (12120210202), we get a palindrome (32321412323).

The spelling of 20201202121 in words is "twenty billion, two hundred one million, two hundred two thousand, one hundred twenty-one".