21202111022102 has 4 divisors (see below), whose sum is σ = 31803166533156. Its totient is φ = 10601055511050.

The previous prime is 21202111022101. The next prime is 21202111022111. The reversal of 21202111022102 is 20122011120212.

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 (21202111022101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300527755524 + ... + 5300527755527.

It is an arithmetic number, because the mean of its divisors is an integer number (7950791633289).

Almost surely, 2^{21202111022102} is an apocalyptic number.

21202111022102 is a deficient number, since it is larger than the sum of its proper divisors (10601055511054).

21202111022102 is a wasteful number, since it uses less digits than its factorization.

21202111022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601055511053.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202111022102 its reverse (20122011120212), we get a palindrome (41324122142314).

The spelling of 21202111022102 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, twenty-two thousand, one hundred two".