1211020121201 has 8 divisors (see below), whose sum is σ = 1322355687744. Its totient is φ = 1099891692720.

The previous prime is 1211020121183. The next prime is 1211020121203. The reversal of 1211020121201 is 1021210201121.

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 1211020121201 - 2²⁶ = 1210953012337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211020121203) 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, 51772286 + ... + 51795671.

It is an arithmetic number, because the mean of its divisors is an integer number (165294460968).

Almost surely, 2^{1211020121201} is an apocalyptic number.

1211020121201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211020121201 is a deficient number, since it is larger than the sum of its proper divisors (111335566543).

1211020121201 is a wasteful number, since it uses less digits than its factorization.

1211020121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103569031.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211020121201 its reverse (1021210201121), we get a palindrome (2232230322322).

The spelling of 1211020121201 in words is "one trillion, two hundred eleven billion, twenty million, one hundred twenty-one thousand, two hundred one".