20200111000121 has 16 divisors (see below), whose sum is σ = 21773886934800. Its totient is φ = 18629186623488.

The previous prime is 20200111000081. The next prime is 20200111000123. The reversal of 20200111000121 is 12100011100202.

It can be written as a sum of positive squares in 8 ways, for example, as 7199218794496 + 13000892205625 = 2683136^2 + 3605675^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200111000121 - 2⁶ = 20200111000057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20200111000123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87735665 + ... + 87965601.

It is an arithmetic number, because the mean of its divisors is an integer number (1360867933425).

Almost surely, 2^{20200111000121} is an apocalyptic number.

It is an amenable number.

20200111000121 is a deficient number, since it is larger than the sum of its proper divisors (1573775934679).

20200111000121 is a wasteful number, since it uses less digits than its factorization.

20200111000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236108.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20200111000121 its reverse (12100011100202), we get a palindrome (32300122100323).

The spelling of 20200111000121 in words is "twenty trillion, two hundred billion, one hundred eleven million, one hundred twenty-one", and thus it is an aban number.