2101021012 has 6 divisors (see below), whose sum is σ = 3676786778. Its totient is φ = 1050510504.

The previous prime is 2101021009. The next prime is 2101021019. The reversal of 2101021012 is 2101201012.

It can be written as a sum of positive squares in only one way, i.e., 1848656016 + 252364996 = 42996^2 + 15886^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2101021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101021019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262627623 + ... + 262627630.

Almost surely, 2^2101021012 is an apocalyptic number.

It is an amenable number.

2101021012 is a deficient number, since it is larger than the sum of its proper divisors (1575765766).

2101021012 is a wasteful number, since it uses less digits than its factorization.

2101021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525255257 (or 525255255 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2101021012 is about 45836.8957500396. The cubic root of 2101021012 is about 1280.7866689325.

Adding to 2101021012 its reverse (2101201012), we get a palindrome (4202222024).

The spelling of 2101021012 in words is "two billion, one hundred one million, twenty-one thousand, twelve".