2112321210021 has 24 divisors (see below), whose sum is σ = 3418465780704. Its totient is φ = 1245594814560.

The previous prime is 2112321209983. The next prime is 2112321210023. The reversal of 2112321210021 is 1200121232112.

2112321210021 is a `hidden beast` number, since 2 + 112 + 321 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 2112321210021 - 2¹³ = 2112321201829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2112321209976 and 2112321210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112321210023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288328471 + ... + 288335796.

It is an arithmetic number, because the mean of its divisors is an integer number (142436074196).

Almost surely, 2^{2112321210021} is an apocalyptic number.

It is an amenable number.

2112321210021 is a deficient number, since it is larger than the sum of its proper divisors (1306144570683).

2112321210021 is a wasteful number, since it uses less digits than its factorization.

2112321210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576664321 (or 576664318 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2112321210021 its reverse (1200121232112), we get a palindrome (3312442442133).

The spelling of 2112321210021 in words is "two trillion, one hundred twelve billion, three hundred twenty-one million, two hundred ten thousand, twenty-one".