2121020112101 has 16 divisors (see below), whose sum is σ = 2435672980800. Its totient is φ = 1826677036800.

The previous prime is 2121020112091. The next prime is 2121020112109. The reversal of 2121020112101 is 1012110201212.

It is not a de Polignac number, because 2121020112101 - 2³⁰ = 2119946370277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020112109) 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, 14393885 + ... + 14540493.

It is an arithmetic number, because the mean of its divisors is an integer number (152229561300).

Almost surely, 2^{2121020112101} is an apocalyptic number.

It is an amenable number.

2121020112101 is a deficient number, since it is larger than the sum of its proper divisors (314652868699).

2121020112101 is a wasteful number, since it uses less digits than its factorization.

2121020112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215860.

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

Adding to 2121020112101 its reverse (1012110201212), we get a palindrome (3133130313313).

The spelling of 2121020112101 in words is "two trillion, one hundred twenty-one billion, twenty million, one hundred twelve thousand, one hundred one".