21222020210102 has 16 divisors (see below), whose sum is σ = 35171020707552. Its totient is φ = 9552622907520.

The previous prime is 21222020210087. The next prime is 21222020210123. The reversal of 21222020210102 is 20101202022212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13569065849 + ... + 13569067412.

It is an arithmetic number, because the mean of its divisors is an integer number (2198188794222).

Almost surely, 2^{21222020210102} is an apocalyptic number.

21222020210102 is a deficient number, since it is larger than the sum of its proper divisors (13949000497450).

21222020210102 is a wasteful number, since it uses less digits than its factorization.

21222020210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27138133303.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222020210102 its reverse (20101202022212), we get a palindrome (41323222232314).

The spelling of 21222020210102 in words is "twenty-one trillion, two hundred twenty-two billion, twenty million, two hundred ten thousand, one hundred two".