2123101202121 has 6 divisors (see below), whose sum is σ = 3066701736410. Its totient is φ = 1415400801408.

The previous prime is 2123101202077. The next prime is 2123101202129. The reversal of 2123101202121 is 1212021013212.

2123101202121 is a `hidden beast` number, since 21 + 2 + 310 + 120 + 212 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1491610329225 + 631490872896 = 1221315^2 + 794664^2 .

It is not a de Polignac number, because 2123101202121 - 2¹⁰ = 2123101201097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2123101202094 and 2123101202103.

It is not an unprimeable number, because it can be changed into a prime (2123101202129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117950066776 + ... + 117950066793.

Almost surely, 2^{2123101202121} is an apocalyptic number.

It is an amenable number.

2123101202121 is a deficient number, since it is larger than the sum of its proper divisors (943600534289).

2123101202121 is a wasteful number, since it uses less digits than its factorization.

2123101202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235900133575 (or 235900133572 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2123101202121 its reverse (1212021013212), we get a palindrome (3335122215333).

The spelling of 2123101202121 in words is "two trillion, one hundred twenty-three billion, one hundred one million, two hundred two thousand, one hundred twenty-one".