20201142121 has 8 divisors (see below), whose sum is σ = 21084477120. Its totient is φ = 19318225872.

The previous prime is 20201142119. The next prime is 20201142127. The reversal of 20201142121 is 12124110202.

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

It is not a de Polignac number, because 20201142121 - 2¹ = 20201142119 is a prime.

It is a super-2 number, since 2×20201142121² (a number of 21 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 = 20201142095 and 20201142104.

It is not an unprimeable number, because it can be changed into a prime (20201142127) 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, 4026 + ... + 201043.

It is an arithmetic number, because the mean of its divisors is an integer number (2635559640).

Almost surely, 2^20201142121 is an apocalyptic number.

It is an amenable number.

20201142121 is a deficient number, since it is larger than the sum of its proper divisors (883334999).

20201142121 is a wasteful number, since it uses less digits than its factorization.

20201142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209375.

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

Adding to 20201142121 its reverse (12124110202), we get a palindrome (32325252323).

The spelling of 20201142121 in words is "twenty billion, two hundred one million, one hundred forty-two thousand, one hundred twenty-one".