10101021011 has 4 divisors (see below), whose sum is σ = 10106248512. Its totient is φ = 10095793512.

The previous prime is 10101020987. The next prime is 10101021017. The reversal of 10101021011 is 11012010101.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10101021011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10101021011.

It is not an unprimeable number, because it can be changed into a prime (10101021017) 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, 2610851 + ... + 2614716.

It is an arithmetic number, because the mean of its divisors is an integer number (2526562128).

Almost surely, 2^10101021011 is an apocalyptic number.

10101021011 is a deficient number, since it is larger than the sum of its proper divisors (5227501).

10101021011 is an equidigital number, since it uses as much as digits as its factorization.

10101021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5227500.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 10101021011 its reverse (11012010101), we get a palindrome (21113031112).

The spelling of 10101021011 in words is "ten billion, one hundred one million, twenty-one thousand, eleven".