21020210202010 has 8 divisors (see below), whose sum is σ = 37836378363636. Its totient is φ = 8408084080800.

The previous prime is 21020210201999. The next prime is 21020210202059. The reversal of 21020210202010 is 1020201202012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19463088066601 + 1557122135409 = 4411699^2 + 1247847^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051010510091 + ... + 1051010510110.

Almost surely, 2^{21020210202010} is an apocalyptic number.

21020210202010 is a deficient number, since it is larger than the sum of its proper divisors (16816168161626).

21020210202010 is a wasteful number, since it uses less digits than its factorization.

21020210202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102021020208.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21020210202010 its reverse (1020201202012), we get a palindrome (22040411404022).

The spelling of 21020210202010 in words is "twenty-one trillion, twenty billion, two hundred ten million, two hundred two thousand, ten".