20111210000121 has 16 divisors (see below), whose sum is σ = 26820611299328. Its totient is φ = 13404641302800.

The previous prime is 20111210000117. The next prime is 20111210000137. The reversal of 20111210000121 is 12100001211102.

It is not a de Polignac number, because 20111210000121 - 2² = 20111210000117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111210000097 and 20111210000106.

It is not an unprimeable number, because it can be changed into a prime (20111211000121) 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, 495439536 + ... + 495480126.

It is an arithmetic number, because the mean of its divisors is an integer number (1676288206208).

Almost surely, 2^{20111210000121} is an apocalyptic number.

It is an amenable number.

20111210000121 is a deficient number, since it is larger than the sum of its proper divisors (6709401299207).

20111210000121 is a wasteful number, since it uses less digits than its factorization.

20111210000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71412.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111210000121 its reverse (12100001211102), we get a palindrome (32211211211223).

The spelling of 20111210000121 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.