1211001121121 has 32 divisors (see below), whose sum is σ = 1394074281600. Its totient is φ = 1041662702080.

The previous prime is 1211001121049. The next prime is 1211001121163. The reversal of 1211001121121 is 1211211001121.

It is not a de Polignac number, because 1211001121121 - 2¹⁰ = 1211001120097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211001121096 and 1211001121105.

It is not an unprimeable number, because it can be changed into a prime (1211001121171) 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, 14447510 + ... + 14531088.

It is an arithmetic number, because the mean of its divisors is an integer number (43564821300).

Almost surely, 2^{1211001121121} is an apocalyptic number.

1211001121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211001121121 is a deficient number, since it is larger than the sum of its proper divisors (183073160479).

1211001121121 is a wasteful number, since it uses less digits than its factorization.

1211001121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84529.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211001121121 its reverse (1211211001121), we get a palindrome (2422212122242).

It can be divided in two parts, 1211001121 and 121, that multiplied together give a palindrome (146531135641).

The spelling of 1211001121121 in words is "one trillion, two hundred eleven billion, one million, one hundred twenty-one thousand, one hundred twenty-one".