212210120121 has 16 divisors (see below), whose sum is σ = 292721290560. Its totient is φ = 136586770880.

The previous prime is 212210120119. The next prime is 212210120137. The reversal of 212210120121 is 121021012212.

It is a cyclic number.

It is not a de Polignac number, because 212210120121 - 2¹ = 212210120119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212210120121.

It is not an unprimeable number, because it can be changed into a prime (212210120021) 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, 1589986 + ... + 1718276.

It is an arithmetic number, because the mean of its divisors is an integer number (18295080660).

Almost surely, 2^212210120121 is an apocalyptic number.

It is an amenable number.

212210120121 is a deficient number, since it is larger than the sum of its proper divisors (80511170439).

212210120121 is a wasteful number, since it uses less digits than its factorization.

212210120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147336.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212210120121 its reverse (121021012212), we get a palindrome (333231132333).

The spelling of 212210120121 in words is "two hundred twelve billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".