2112022120021 has 4 divisors (see below), whose sum is σ = 2304024130944. Its totient is φ = 1920020109100.

The previous prime is 2112022120009. The next prime is 2112022120057. The reversal of 2112022120021 is 1200212202112.

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 2112022120021 - 2⁵ = 2112022119989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112022119977 and 2112022120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112022127021) 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, 96001005445 + ... + 96001005466.

It is an arithmetic number, because the mean of its divisors is an integer number (576006032736).

Almost surely, 2^{2112022120021} is an apocalyptic number.

It is an amenable number.

2112022120021 is a deficient number, since it is larger than the sum of its proper divisors (192002010923).

2112022120021 is a wasteful number, since it uses less digits than its factorization.

2112022120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192002010922.

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

Adding to 2112022120021 its reverse (1200212202112), we get a palindrome (3312234322133).

The spelling of 2112022120021 in words is "two trillion, one hundred twelve billion, twenty-two million, one hundred twenty thousand, twenty-one".