2121111020101 has 8 divisors (see below), whose sum is σ = 2161455285600. Its totient is φ = 2080913195760.

The previous prime is 2121111020089. The next prime is 2121111020107. The reversal of 2121111020101 is 1010201111212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121111020101 - 2¹³ = 2121111011909 is a prime.

It is a super-2 number, since 2×2121111020101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121111020107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36581046 + ... + 36638983.

It is an arithmetic number, because the mean of its divisors is an integer number (270181910700).

Almost surely, 2^{2121111020101} is an apocalyptic number.

It is an amenable number.

2121111020101 is a deficient number, since it is larger than the sum of its proper divisors (40344265499).

2121111020101 is an equidigital number, since it uses as much as digits as its factorization.

2121111020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73220579.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2121111020101 its reverse (1010201111212), we get a palindrome (3131312131313).

The spelling of 2121111020101 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, twenty thousand, one hundred one".