1212021120121 has 16 divisors (see below), whose sum is σ = 1387254808576. Its totient is φ = 1037309769936.

The previous prime is 1212021120109. The next prime is 1212021120133. The reversal of 1212021120121 is 1210211202121.

It is an interprime number because it is at equal distance from previous prime (1212021120109) and next prime (1212021120133).

It is a cyclic number.

It is not a de Polignac number, because 1212021120121 - 2²¹ = 1212019022969 is a prime.

It is a super-2 number, since 2×1212021120121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212021120095 and 1212021120104.

It is not an unprimeable number, because it can be changed into a prime (1212021180121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65979880 + ... + 65998246.

It is an arithmetic number, because the mean of its divisors is an integer number (86703425536).

Almost surely, 2^{1212021120121} is an apocalyptic number.

It is an amenable number.

1212021120121 is a deficient number, since it is larger than the sum of its proper divisors (175233688455).

1212021120121 is a wasteful number, since it uses less digits than its factorization.

1212021120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32068.

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

Adding to 1212021120121 its reverse (1210211202121), we get a palindrome (2422232322242).

The spelling of 1212021120121 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty thousand, one hundred twenty-one".