212102121121 has 8 divisors (see below), whose sum is σ = 232305984288. Its totient is φ = 192051900000.

The previous prime is 212102121113. The next prime is 212102121191. The reversal of 212102121121 is 121121201212.

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 212102121121 - 2³ = 212102121113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212102121095 and 212102121104.

It is not an unprimeable number, because it can be changed into a prime (212102121191) 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, 38407620 + ... + 38413141.

It is an arithmetic number, because the mean of its divisors is an integer number (29038248036).

Almost surely, 2^212102121121 is an apocalyptic number.

It is an amenable number.

212102121121 is a deficient number, since it is larger than the sum of its proper divisors (20203863167).

212102121121 is a wasteful number, since it uses less digits than its factorization.

212102121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76821023.

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

Adding to 212102121121 its reverse (121121201212), we get a palindrome (333223322333).

The spelling of 212102121121 in words is "two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred twenty-one".