2112001210021 has 16 divisors (see below), whose sum is σ = 2190880217088. Its totient is φ = 2033813980800.

The previous prime is 2112001210003. The next prime is 2112001210079. The reversal of 2112001210021 is 1200121002112.

It is a cyclic number.

It is not a de Polignac number, because 2112001210021 - 2¹⁷ = 2112001078949 is a prime.

It is a super-2 number, since 2×2112001210021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112001209983 and 2112001210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112001210001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6219780 + ... + 6550546.

It is an arithmetic number, because the mean of its divisors is an integer number (136930013568).

Almost surely, 2^{2112001210021} is an apocalyptic number.

It is an amenable number.

2112001210021 is a deficient number, since it is larger than the sum of its proper divisors (78879007067).

2112001210021 is a wasteful number, since it uses less digits than its factorization.

2112001210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331812.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2112001210021 its reverse (1200121002112), we get a palindrome (3312122212133).

The spelling of 2112001210021 in words is "two trillion, one hundred twelve billion, one million, two hundred ten thousand, twenty-one".