212001112120021 has 8 divisors (see below), whose sum is σ = 242301290604480. Its totient is φ = 181704509966688.

The previous prime is 212001112119997. The next prime is 212001112120117. The reversal of 212001112120021 is 120021211100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212001112120021 - 2⁹ = 212001112119509 is a prime.

It is a super-2 number, since 2×212001112120021² (a number of 29 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 = 212001112119977 and 212001112120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001112120921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893955751 + ... + 894192868.

It is an arithmetic number, because the mean of its divisors is an integer number (30287661325560).

Almost surely, 2^{212001112120021} is an apocalyptic number.

It is an amenable number.

212001112120021 is a deficient number, since it is larger than the sum of its proper divisors (30300178484459).

212001112120021 is a wasteful number, since it uses less digits than its factorization.

212001112120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788165563.

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

Adding to 212001112120021 its reverse (120021211100212), we get a palindrome (332022323220233).

The spelling of 212001112120021 in words is "two hundred twelve trillion, one billion, one hundred twelve million, one hundred twenty thousand, twenty-one".