1201211001211 has 16 divisors (see below), whose sum is σ = 1294737883488. Its totient is φ = 1107845395200.

The previous prime is 1201211001191. The next prime is 1201211001239. The reversal of 1201211001211 is 1121001121021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201211001211 - 2²¹ = 1201208904059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201211001191 and 1201211001200.

It is not an unprimeable number, because it can be changed into a prime (1201211001251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116267316 + ... + 116277646.

It is an arithmetic number, because the mean of its divisors is an integer number (80921117718).

Almost surely, 2^{1201211001211} is an apocalyptic number.

1201211001211 is a deficient number, since it is larger than the sum of its proper divisors (93526882277).

1201211001211 is a wasteful number, since it uses less digits than its factorization.

1201211001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17262.

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

Adding to 1201211001211 its reverse (1121001121021), we get a palindrome (2322212122232).

The spelling of 1201211001211 in words is "one trillion, two hundred one billion, two hundred eleven million, one thousand, two hundred eleven".