1212001320121 has 8 divisors (see below), whose sum is σ = 1215893564424. Its totient is φ = 1208109509760.

The previous prime is 1212001320077. The next prime is 1212001320137. The reversal of 1212001320121 is 1210231002121.

It can be written as a sum of positive squares in 4 ways, for example, as 370681274896 + 841320045225 = 608836^2 + 917235^2 .

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 1212001320121 - 2¹³ = 1212001311929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212001320095 and 1212001320104.

It is not an unprimeable number, because it can be changed into a prime (1212001320191) 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, 6045141 + ... + 6242413.

It is an arithmetic number, because the mean of its divisors is an integer number (151986695553).

Almost surely, 2^{1212001320121} is an apocalyptic number.

It is an amenable number.

1212001320121 is a deficient number, since it is larger than the sum of its proper divisors (3892244303).

1212001320121 is a wasteful number, since it uses less digits than its factorization.

1212001320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216971.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212001320121 its reverse (1210231002121), we get a palindrome (2422232322242).

The spelling of 1212001320121 in words is "one trillion, two hundred twelve billion, one million, three hundred twenty thousand, one hundred twenty-one".