101010010021 has 16 divisors (see below), whose sum is σ = 103801864320.
Its totient is φ = 98234219520.
The previous prime is 101010010007. The next prime is 101010010033. The reversal of 101010010021 is 120010010101.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-101010010021 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 101010009986 and 101010010013.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (101010010081) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30542650 + ... + 30545956.
It is an arithmetic number, because the mean of its divisors is an integer number (6487616520).
Almost surely, 2101010010021 is an apocalyptic number.
It is an amenable number.
101010010021 is a deficient number, since it is larger than the sum of its proper divisors (2791854299).
101010010021 is a wasteful number, since it uses less digits than its factorization.
101010010021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5484.
The product of its (nonzero) digits is 2, while the sum is 7.
Adding to 101010010021 its reverse (120010010101), we get a palindrome (221020020122).
The spelling of 101010010021 in words is "one hundred one billion, ten million, ten thousand, twenty-one".