1211010120011 has 4 divisors (see below), whose sum is σ = 1250074962624. Its totient is φ = 1171945277400.

The previous prime is 1211010119947. The next prime is 1211010120017. The reversal of 1211010120011 is 1100210101121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211010120011 - 2⁶ = 1211010119947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211010119974 and 1211010120001.

It is not an unprimeable number, because it can be changed into a prime (1211010120017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19532421260 + ... + 19532421321.

It is an arithmetic number, because the mean of its divisors is an integer number (312518740656).

Almost surely, 2^{1211010120011} is an apocalyptic number.

1211010120011 is a deficient number, since it is larger than the sum of its proper divisors (39064842613).

1211010120011 is an equidigital number, since it uses as much as digits as its factorization.

1211010120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39064842612.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211010120011 its reverse (1100210101121), we get a palindrome (2311220221132).

The spelling of 1211010120011 in words is "one trillion, two hundred eleven billion, ten million, one hundred twenty thousand, eleven".