1211101202011 has 2 divisors, whose sum is σ = 1211101202012. Its totient is φ = 1211101202010.

The previous prime is 1211101201967. The next prime is 1211101202033. The reversal of 1211101202011 is 1102021011121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211101202011 - 2²⁹ = 1210564331099 is a prime.

It is a super-2 number, since 2×1211101202011² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211101201982 and 1211101202000.

It is not a weakly prime, because it can be changed into another prime (1211101202411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605550601005 + 605550601006.

It is an arithmetic number, because the mean of its divisors is an integer number (605550601006).

Almost surely, 2^{1211101202011} is an apocalyptic number.

1211101202011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211101202011 is an equidigital number, since it uses as much as digits as its factorization.

1211101202011 is an evil number, because the sum of its binary digits is even.

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

Adding to 1211101202011 its reverse (1102021011121), we get a palindrome (2313122213132).

The spelling of 1211101202011 in words is "one trillion, two hundred eleven billion, one hundred one million, two hundred two thousand, eleven".