2121012121101 has 16 divisors (see below), whose sum is σ = 2829709209600. Its totient is φ = 1413161772848.

The previous prime is 2121012121027. The next prime is 2121012121139. The reversal of 2121012121101 is 1011212101212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2121012121101 - 2¹¹ = 2121012119053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012121201) 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, 47124730 + ... + 47169716.

It is an arithmetic number, because the mean of its divisors is an integer number (176856825600).

Almost surely, 2^{2121012121101} is an apocalyptic number.

It is an amenable number.

2121012121101 is a deficient number, since it is larger than the sum of its proper divisors (708697088499).

2121012121101 is a wasteful number, since it uses less digits than its factorization.

2121012121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54048.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121012121101 its reverse (1011212101212), we get a palindrome (3132224222313).

The spelling of 2121012121101 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twenty-one thousand, one hundred one".