21220122102 has 16 divisors (see below), whose sum is σ = 42527396352. Its totient is φ = 7058848680.

The previous prime is 21220122101. The next prime is 21220122107. The reversal of 21220122102 is 20122102212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220122101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628174 + ... + 3634017.

It is an arithmetic number, because the mean of its divisors is an integer number (2657962272).

Almost surely, 2^21220122102 is an apocalyptic number.

21220122102 is an abundant number, since it is smaller than the sum of its proper divisors (21307274250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220122102 is a wasteful number, since it uses less digits than its factorization.

21220122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7262683.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220122102 its reverse (20122102212), we get a palindrome (41342224314).

It can be divided in two parts, 212 and 20122102, that multiplied together give a palindrome (4265885624).

The spelling of 21220122102 in words is "twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred two".