2122021101121 has 4 divisors (see below), whose sum is σ = 2122909350100. Its totient is φ = 2121132852144.

The previous prime is 2122021101107. The next prime is 2122021101127. The reversal of 2122021101121 is 1211011202212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1178473080625 + 943548020496 = 1085575^2 + 971364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122021101121 - 2¹⁹ = 2122020576833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122021101095 and 2122021101104.

It is not an unprimeable number, because it can be changed into a prime (2122021101127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444120906 + ... + 444125683.

It is an arithmetic number, because the mean of its divisors is an integer number (530727337525).

Almost surely, 2^{2122021101121} is an apocalyptic number.

It is an amenable number.

2122021101121 is a deficient number, since it is larger than the sum of its proper divisors (888248979).

2122021101121 is an equidigital number, since it uses as much as digits as its factorization.

2122021101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888248978.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2122021101121 its reverse (1211011202212), we get a palindrome (3333032303333).

The spelling of 2122021101121 in words is "two trillion, one hundred twenty-two billion, twenty-one million, one hundred one thousand, one hundred twenty-one".