2100121001121 has 32 divisors (see below), whose sum is σ = 3289862661120. Its totient is φ = 1174834785600.

The previous prime is 2100121001117. The next prime is 2100121001141. The reversal of 2100121001121 is 1211001210012.

It is not a de Polignac number, because 2100121001121 - 2² = 2100121001117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100121001097 and 2100121001106.

It is not an unprimeable number, because it can be changed into a prime (2100121001141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9447826 + ... + 9667556.

It is an arithmetic number, because the mean of its divisors is an integer number (102808208160).

Almost surely, 2^{2100121001121} is an apocalyptic number.

It is an amenable number.

2100121001121 is a deficient number, since it is larger than the sum of its proper divisors (1189741659999).

2100121001121 is a wasteful number, since it uses less digits than its factorization.

2100121001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242037.

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

Adding to 2100121001121 its reverse (1211001210012), we get a palindrome (3311122211133).

The spelling of 2100121001121 in words is "two trillion, one hundred billion, one hundred twenty-one million, one thousand, one hundred twenty-one".