1211011211201 has 8 divisors (see below), whose sum is σ = 1349211717504. Its totient is φ = 1077495467920.

The previous prime is 1211011211177. The next prime is 1211011211239. The reversal of 1211011211201 is 1021121101121.

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 1211011211201 - 2¹⁴ = 1211011194817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211011213201) 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, 1171190210 + ... + 1171191243.

It is an arithmetic number, because the mean of its divisors is an integer number (168651464688).

Almost surely, 2^{1211011211201} is an apocalyptic number.

1211011211201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211011211201 is a deficient number, since it is larger than the sum of its proper divisors (138200506303).

1211011211201 is a wasteful number, since it uses less digits than its factorization.

1211011211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342381511.

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

Adding to 1211011211201 its reverse (1021121101121), we get a palindrome (2232132312322).

The spelling of 1211011211201 in words is "one trillion, two hundred eleven billion, eleven million, two hundred eleven thousand, two hundred one".