21202021020010 has 32 divisors (see below), whose sum is σ = 39966691635072. Its totient is φ = 8082792104640.

The previous prime is 21202021020001. The next prime is 21202021020049. The reversal of 21202021020010 is 1002012020212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166331056 + ... + 166458475.

It is an arithmetic number, because the mean of its divisors is an integer number (1248959113596).

Almost surely, 2^{21202021020010} is an apocalyptic number.

21202021020010 is a deficient number, since it is larger than the sum of its proper divisors (18764670615062).

21202021020010 is a wasteful number, since it uses less digits than its factorization.

21202021020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332789838.

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

Adding to 21202021020010 its reverse (1002012020212), we get a palindrome (22204033040222).

The spelling of 21202021020010 in words is "twenty-one trillion, two hundred two billion, twenty-one million, twenty thousand, ten".