1212210120121 has 32 divisors (see below), whose sum is σ = 1627683499008. Its totient is φ = 871865432640.

The previous prime is 1212210120119. The next prime is 1212210120157. The reversal of 1212210120121 is 1210210122121.

It is a cyclic number.

It is not a de Polignac number, because 1212210120121 - 2¹ = 1212210120119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212210120095 and 1212210120104.

It is not an unprimeable number, because it can be changed into a prime (1212210120221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23600950 + ... + 23652256.

It is an arithmetic number, because the mean of its divisors is an integer number (50865109344).

Almost surely, 2^{1212210120121} is an apocalyptic number.

1212210120121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212210120121 is a deficient number, since it is larger than the sum of its proper divisors (415473378887).

1212210120121 is a wasteful number, since it uses less digits than its factorization.

1212210120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74941.

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

Adding to 1212210120121 its reverse (1210210122121), we get a palindrome (2422420242242).

It can be divided in two parts, 1212210 and 120121, that added together give a palindrome (1332331).

The spelling of 1212210120121 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".