2121121002101 has 16 divisors (see below), whose sum is σ = 2367064244160. Its totient is φ = 1888904943360.

The previous prime is 2121121002031. The next prime is 2121121002103. The reversal of 2121121002101 is 1012001211212.

It is a cyclic number.

It is not a de Polignac number, because 2121121002101 - 2²⁶ = 2121053893237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121002103) 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, 3862355 + ... + 4377216.

It is an arithmetic number, because the mean of its divisors is an integer number (147941515260).

Almost surely, 2^{2121121002101} is an apocalyptic number.

It is an amenable number.

2121121002101 is a deficient number, since it is larger than the sum of its proper divisors (245943242059).

2121121002101 is a wasteful number, since it uses less digits than its factorization.

2121121002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8240404.

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

Adding to 2121121002101 its reverse (1012001211212), we get a palindrome (3133122213313).

The spelling of 2121121002101 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two thousand, one hundred one".