10021210111 has 4 divisors (see below), whose sum is σ = 10932229224. Its totient is φ = 9110191000.

The previous prime is 10021210057. The next prime is 10021210151. The reversal of 10021210111 is 11101212001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11101212001 = 11 ⋅1009201091.

It is a cyclic number.

It is not a de Polignac number, because 10021210111 - 2⁷ = 10021209983 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 (10021210151) 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, 455509540 + ... + 455509561.

It is an arithmetic number, because the mean of its divisors is an integer number (2733057306).

Almost surely, 2^10021210111 is an apocalyptic number.

10021210111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10021210111 is a deficient number, since it is larger than the sum of its proper divisors (911019113).

10021210111 is an equidigital number, since it uses as much as digits as its factorization.

10021210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911019112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10021210111 its reverse (11101212001), we get a palindrome (21122422112).

The spelling of 10021210111 in words is "ten billion, twenty-one million, two hundred ten thousand, one hundred eleven".