1212211201121 has 8 divisors (see below), whose sum is σ = 1222762829184. Its totient is φ = 1201695402960.

The previous prime is 1212211201111. The next prime is 1212211201151. The reversal of 1212211201121 is 1211021122121.

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 1212211201121 - 2¹⁰ = 1212211200097 is a prime.

It is a super-2 number, since 2×1212211201121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212211201121.

It is not an unprimeable number, because it can be changed into a prime (1212211201111) 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, 8889515 + ... + 9024848.

It is an arithmetic number, because the mean of its divisors is an integer number (152845353648).

Almost surely, 2^{1212211201121} is an apocalyptic number.

It is an amenable number.

1212211201121 is a deficient number, since it is larger than the sum of its proper divisors (10551628063).

1212211201121 is a wasteful number, since it uses less digits than its factorization.

1212211201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17914951.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212211201121 its reverse (1211021122121), we get a palindrome (2423232323242).

The spelling of 1212211201121 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".