212120111022121 has 8 divisors (see below), whose sum is σ = 215742035368800. Its totient is φ = 208499075616480.

The previous prime is 212120111022109. The next prime is 212120111022133. The reversal of 212120111022121 is 121220111021212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212120111022109) and next prime (212120111022133).

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 212120111022121 - 2³⁷ = 211982672068649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120111022181) 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, 221753935 + ... + 222708436.

It is an arithmetic number, because the mean of its divisors is an integer number (26967754421100).

Almost surely, 2^{212120111022121} is an apocalyptic number.

It is an amenable number.

212120111022121 is a deficient number, since it is larger than the sum of its proper divisors (3621924346679).

212120111022121 is an equidigital number, since it uses as much as digits as its factorization.

212120111022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444470519.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212120111022121 its reverse (121220111021212), we get a palindrome (333340222043333).

Subtracting from 212120111022121 its reverse (121220111021212), we obtain a palindrome (90900000000909).

The spelling of 212120111022121 in words is "two hundred twelve trillion, one hundred twenty billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".