20213210102 has 4 divisors (see below), whose sum is σ = 30319815156. Its totient is φ = 10106605050.

The previous prime is 20213210089. The next prime is 20213210107. The reversal of 20213210102 is 20101231202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213210107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053302524 + ... + 5053302527.

It is an arithmetic number, because the mean of its divisors is an integer number (7579953789).

Almost surely, 2^20213210102 is an apocalyptic number.

20213210102 is a deficient number, since it is larger than the sum of its proper divisors (10106605054).

20213210102 is a wasteful number, since it uses less digits than its factorization.

20213210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106605053.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20213210102 its reverse (20101231202), we get a palindrome (40314441304).

It can be divided in two parts, 2021 and 3210102, that added together give a palindrome (3212123).

The spelling of 20213210102 in words is "twenty billion, two hundred thirteen million, two hundred ten thousand, one hundred two".