101010021011 has 4 divisors (see below), whose sum is σ = 101249950224. Its totient is φ = 100770091800.

The previous prime is 101010020981. The next prime is 101010021037. The reversal of 101010021011 is 110120010101.

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-101010021011 is a prime.

It is a super-2 number, since 2×101010021011² (a number of 23 digits) contains 22 as substring.

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 101010021011.

It is not an unprimeable number, because it can be changed into a prime (101010021071) 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, 119963975 + ... + 119964816.

It is an arithmetic number, because the mean of its divisors is an integer number (25312487556).

Almost surely, 2^101010021011 is an apocalyptic number.

101010021011 is a deficient number, since it is larger than the sum of its proper divisors (239929213).

101010021011 is an equidigital number, since it uses as much as digits as its factorization.

101010021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239929212.

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

Adding to 101010021011 its reverse (110120010101), we get a palindrome (211130031112).

The spelling of 101010021011 in words is "one hundred one billion, ten million, twenty-one thousand, eleven".