20200012121 has 8 divisors (see below), whose sum is σ = 20226905088. Its totient is φ = 20173140000.

The previous prime is 20200012117. The next prime is 20200012139. The reversal of 20200012121 is 12121000202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20200012121 - 2² = 20200012117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20200012111) 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, 2885936 + ... + 2892926.

It is an arithmetic number, because the mean of its divisors is an integer number (2528363136).

Almost surely, 2^20200012121 is an apocalyptic number.

It is an amenable number.

20200012121 is a deficient number, since it is larger than the sum of its proper divisors (26892967).

20200012121 is a wasteful number, since it uses less digits than its factorization.

20200012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10423.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20200012121 its reverse (12121000202), we get a palindrome (32321012323).

The spelling of 20200012121 in words is "twenty billion, two hundred million, twelve thousand, one hundred twenty-one".