10211220101111 has 4 divisors (see below), whose sum is σ = 10211228626824. Its totient is φ = 10211211575400.

The previous prime is 10211220101107. The next prime is 10211220101143. The reversal of 10211220101111 is 11110102211201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10211220101111 - 2² = 10211220101107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211220101171) 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, 2100785 + ... + 4983546.

It is an arithmetic number, because the mean of its divisors is an integer number (2552807156706).

Almost surely, 2^{10211220101111} is an apocalyptic number.

10211220101111 is a deficient number, since it is larger than the sum of its proper divisors (8525713).

10211220101111 is an equidigital number, since it uses as much as digits as its factorization.

10211220101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8525712.

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

Adding to 10211220101111 its reverse (11110102211201), we get a palindrome (21321322312312).

The spelling of 10211220101111 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, one hundred one thousand, one hundred eleven".