2102021012 has 72 divisors (see below), whose sum is σ = 4619041056. Its totient is φ = 829628352.

The previous prime is 2102020993. The next prime is 2102021027. The reversal of 2102021012 is 2101202012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2102020984 and 2102021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1637723 + ... + 1639005.

It is an arithmetic number, because the mean of its divisors is an integer number (64153348).

Almost surely, 2^2102021012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309520528).

2102021012 is an abundant number, since it is smaller than the sum of its proper divisors (2517020044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2102021012 is a wasteful number, since it uses less digits than its factorization.

2102021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2102021012 is about 45847.8026954401. The cubic root of 2102021012 is about 1280.9898373784.

Adding to 2102021012 its reverse (2101202012), we get a palindrome (4203223024).

The spelling of 2102021012 in words is "two billion, one hundred two million, twenty-one thousand, twelve".