212112210121 has 8 divisors (see below), whose sum is σ = 242417052864. Its totient is φ = 181808142000.

The previous prime is 212112210103. The next prime is 212112210131. The reversal of 212112210121 is 121012211212.

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 212112210121 - 2⁷ = 212112209993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212112210095 and 212112210104.

It is not an unprimeable number, because it can be changed into a prime (212112210131) 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, 622371 + ... + 900871.

It is an arithmetic number, because the mean of its divisors is an integer number (30302131608).

Almost surely, 2^212112210121 is an apocalyptic number.

It is an amenable number.

212112210121 is a deficient number, since it is larger than the sum of its proper divisors (30304842743).

212112210121 is a wasteful number, since it uses less digits than its factorization.

212112210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387311.

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

Adding to 212112210121 its reverse (121012211212), we get a palindrome (333124421333).

The spelling of 212112210121 in words is "two hundred twelve billion, one hundred twelve million, two hundred ten thousand, one hundred twenty-one".