20021210102 has 8 divisors (see below), whose sum is σ = 30113646816. Its totient is φ = 9983327832.

The previous prime is 20021210087. The next prime is 20021210147. The reversal of 20021210102 is 20101212002.

It is a happy number.

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

It is a congruent number.

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, 13637693 + ... + 13639160.

It is an arithmetic number, because the mean of its divisors is an integer number (3764205852).

Almost surely, 2^20021210102 is an apocalyptic number.

20021210102 is a deficient number, since it is larger than the sum of its proper divisors (10092436714).

20021210102 is a wasteful number, since it uses less digits than its factorization.

20021210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27277222.

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

Adding to 20021210102 its reverse (20101212002), we get a palindrome (40122422104).

The spelling of 20021210102 in words is "twenty billion, twenty-one million, two hundred ten thousand, one hundred two".