21010220210102 has 4 divisors (see below), whose sum is σ = 31515330315156. Its totient is φ = 10505110105050.

The previous prime is 21010220210087. The next prime is 21010220210107. The reversal of 21010220210102 is 20101202201012.

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 (21010220210107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252555052524 + ... + 5252555052527.

It is an arithmetic number, because the mean of its divisors is an integer number (7878832578789).

Almost surely, 2^{21010220210102} is an apocalyptic number.

21010220210102 is a deficient number, since it is larger than the sum of its proper divisors (10505110105054).

21010220210102 is a wasteful number, since it uses less digits than its factorization.

21010220210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505110105053.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21010220210102 its reverse (20101202201012), we get a palindrome (41111422411114).

The spelling of 21010220210102 in words is "twenty-one trillion, ten billion, two hundred twenty million, two hundred ten thousand, one hundred two".