1211201101111 has 8 divisors (see below), whose sum is σ = 1240826328000. Its totient is φ = 1181579861760.

The previous prime is 1211201101079. The next prime is 1211201101141. The reversal of 1211201101111 is 1111011021121.

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 1211201101111 - 2⁵ = 1211201101079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211201101091 and 1211201101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201101141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377311 + ... + 1601488.

It is an arithmetic number, because the mean of its divisors is an integer number (155103291000).

Almost surely, 2^{1211201101111} is an apocalyptic number.

1211201101111 is a deficient number, since it is larger than the sum of its proper divisors (29625226889).

1211201101111 is a wasteful number, since it uses less digits than its factorization.

1211201101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993769.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1211201101111 its reverse (1111011021121), we get a palindrome (2322212122232).

The spelling of 1211201101111 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred one thousand, one hundred eleven".