20000121211 has 12 divisors (see below), whose sum is σ = 23443053480. Its totient is φ = 17012093280.

The previous prime is 20000121173. The next prime is 20000121269. The reversal of 20000121211 is 11212100002.

It is not a de Polignac number, because 20000121211 - 2¹⁷ = 19999990139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20000121611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1551466 + ... + 1564303.

It is an arithmetic number, because the mean of its divisors is an integer number (1953587790).

Almost surely, 2^20000121211 is an apocalyptic number.

20000121211 is a deficient number, since it is larger than the sum of its proper divisors (3442932269).

20000121211 is a wasteful number, since it uses less digits than its factorization.

20000121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115914 (or 3115907 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20000121211 its reverse (11212100002), we get a palindrome (31212221213).

The spelling of 20000121211 in words is "twenty billion, one hundred twenty-one thousand, two hundred eleven".