1211002001121 has 24 divisors (see below), whose sum is σ = 1774934795200. Its totient is φ = 733885621920.

The previous prime is 1211002001117. The next prime is 1211002001149.

1211002001121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1211002001121 - 2² = 1211002001117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211002001097 and 1211002001106.

It is not an unprimeable number, because it can be changed into a prime (1211002002121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5018196 + ... + 5253978.

Almost surely, 2^{1211002001121} is an apocalyptic number.

1211002001121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211002001121 is a deficient number, since it is larger than the sum of its proper divisors (563932794079).

1211002001121 is a wasteful number, since it uses less digits than its factorization.

1211002001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249957 (or 249946 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The spelling of 1211002001121 in words is "one trillion, two hundred eleven billion, two million, one thousand, one hundred twenty-one".