2100211210121 has 16 divisors (see below), whose sum is σ = 2144929950528. Its totient is φ = 2055929299200.

The previous prime is 2100211210099. The next prime is 2100211210129. The reversal of 2100211210121 is 1210121120012.

It is a cyclic number.

It is not a de Polignac number, because 2100211210121 - 2¹⁰ = 2100211209097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100211210096 and 2100211210105.

It is not an unprimeable number, because it can be changed into a prime (2100211210129) 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, 62099306 + ... + 62133116.

It is an arithmetic number, because the mean of its divisors is an integer number (134058121908).

Almost surely, 2^{2100211210121} is an apocalyptic number.

It is an amenable number.

2100211210121 is a deficient number, since it is larger than the sum of its proper divisors (44718740407).

2100211210121 is a wasteful number, since it uses less digits than its factorization.

2100211210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40232.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2100211210121 its reverse (1210121120012), we get a palindrome (3310332330133).

The spelling of 2100211210121 in words is "two trillion, one hundred billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".