1201011121211 has 16 divisors (see below), whose sum is σ = 1312569043296. Its totient is φ = 1089849600000.

The previous prime is 1201011121183. The next prime is 1201011121231. The reversal of 1201011121211 is 1121211101021.

It is a cyclic number.

It is not a de Polignac number, because 1201011121211 - 2¹⁰ = 1201011120187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201011121231) 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 15 ways as a sum of consecutive naturals, for example, 84091391 + ... + 84105671.

It is an arithmetic number, because the mean of its divisors is an integer number (82035565206).

Almost surely, 2^{1201011121211} is an apocalyptic number.

1201011121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201011121211 is a deficient number, since it is larger than the sum of its proper divisors (111557922085).

1201011121211 is a wasteful number, since it uses less digits than its factorization.

1201011121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27614.

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

Adding to 1201011121211 its reverse (1121211101021), we get a palindrome (2322222222232).

The spelling of 1201011121211 in words is "one trillion, two hundred one billion, eleven million, one hundred twenty-one thousand, two hundred eleven".