10101021111 has 8 divisors (see below), whose sum is σ = 14964475760. Its totient is φ = 6734014056.

The previous prime is 10101021107. The next prime is 10101021181. The reversal of 10101021111 is 11112010101.

10101021111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10101021111 - 2² = 10101021107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101021093 and 10101021102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101021181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187055920 + ... + 187055973.

It is an arithmetic number, because the mean of its divisors is an integer number (1870559470).

Almost surely, 2^10101021111 is an apocalyptic number.

10101021111 is a deficient number, since it is larger than the sum of its proper divisors (4863454649).

10101021111 is an equidigital number, since it uses as much as digits as its factorization.

10101021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374111902 (or 374111896 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 10101021111 its reverse (11112010101), we get a palindrome (21213031212).

It can be divided in two parts, 1010 and 1021111, that added together give a square (1022121 = 1011²).

The spelling of 10101021111 in words is "ten billion, one hundred one million, twenty-one thousand, one hundred eleven".