2121001120101 has 16 divisors (see below), whose sum is σ = 2919385497600. Its totient is φ = 1368313686960.

The previous prime is 2121001120061. The next prime is 2121001120181. The reversal of 2121001120101 is 1010211001212.

It is not a de Polignac number, because 2121001120101 - 2⁷ = 2121001119973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121001120181) 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, 1134700 + ... + 2351498.

It is an arithmetic number, because the mean of its divisors is an integer number (182461593600).

Almost surely, 2^{2121001120101} is an apocalyptic number.

It is an amenable number.

2121001120101 is a deficient number, since it is larger than the sum of its proper divisors (798384377499).

2121001120101 is a wasteful number, since it uses less digits than its factorization.

2121001120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235576.

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

Adding to 2121001120101 its reverse (1010211001212), we get a palindrome (3131212121313).

The spelling of 2121001120101 in words is "two trillion, one hundred twenty-one billion, one million, one hundred twenty thousand, one hundred one".