1211011200121 has 8 divisors (see below), whose sum is σ = 1232448648480. Its totient is φ = 1189736774592.

The previous prime is 1211011200083. The next prime is 1211011200149. The reversal of 1211011200121 is 1210021101121.

It is a happy number.

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 1211011200121 - 2⁹ = 1211011199609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211011200151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40740720 + ... + 40770433.

It is an arithmetic number, because the mean of its divisors is an integer number (154056081060).

Almost surely, 2^{1211011200121} is an apocalyptic number.

It is an amenable number.

1211011200121 is a deficient number, since it is larger than the sum of its proper divisors (21437448359).

1211011200121 is an equidigital number, since it uses as much as digits as its factorization.

1211011200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81511415.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211011200121 its reverse (1210021101121), we get a palindrome (2421032301242).

The spelling of 1211011200121 in words is "one trillion, two hundred eleven billion, eleven million, two hundred thousand, one hundred twenty-one".