2102013021 has 8 divisors (see below), whose sum is σ = 2803485760. Its totient is φ = 1400941152.

The previous prime is 2102013013. The next prime is 2102013029. The reversal of 2102013021 is 1203102012.

It is an interprime number because it is at equal distance from previous prime (2102013013) and next prime (2102013029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102013021 - 2³ = 2102013013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102012988 and 2102013006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102013029) 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, 87760 + ... + 109113.

It is an arithmetic number, because the mean of its divisors is an integer number (350435720).

Almost surely, 2^2102013021 is an apocalyptic number.

It is an amenable number.

2102013021 is a deficient number, since it is larger than the sum of its proper divisors (701472739).

2102013021 is a wasteful number, since it uses less digits than its factorization.

2102013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200435.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2102013021 is about 45847.7155483237. The cubic root of 2102013021 is about 1280.9882141148.

Adding to 2102013021 its reverse (1203102012), we get a palindrome (3305115033).

The spelling of 2102013021 in words is "two billion, one hundred two million, thirteen thousand, twenty-one".