2122120201021 has 4 divisors (see below), whose sum is σ = 2132177642944. Its totient is φ = 2112062759100.

The previous prime is 2122120200997. The next prime is 2122120201057. The reversal of 2122120201021 is 1201020212212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2122120201021 - 2¹¹ = 2122120198973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122120200986 and 2122120201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122120201321) 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, 5028720645 + ... + 5028721066.

It is an arithmetic number, because the mean of its divisors is an integer number (533044410736).

Almost surely, 2^{2122120201021} is an apocalyptic number.

It is an amenable number.

2122120201021 is a deficient number, since it is larger than the sum of its proper divisors (10057441923).

2122120201021 is a wasteful number, since it uses less digits than its factorization.

2122120201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057441922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2122120201021 its reverse (1201020212212), we get a palindrome (3323140413233).

The spelling of 2122120201021 in words is "two trillion, one hundred twenty-two billion, one hundred twenty million, two hundred one thousand, twenty-one".