20122212210 has 16 divisors (see below), whose sum is σ = 48293309376. Its totient is φ = 5365923248.

The previous prime is 20122212203. The next prime is 20122212233. The reversal of 20122212210 is 1221222102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20122212210.

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, 335370174 + ... + 335370233.

It is an arithmetic number, because the mean of its divisors is an integer number (3018331836).

Almost surely, 2^20122212210 is an apocalyptic number.

20122212210 is an abundant number, since it is smaller than the sum of its proper divisors (28171097166).

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

20122212210 is a wasteful number, since it uses less digits than its factorization.

20122212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670740417.

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

Adding to 20122212210 its reverse (1221222102), we get a palindrome (21343434312).

The spelling of 20122212210 in words is "twenty billion, one hundred twenty-two million, two hundred twelve thousand, two hundred ten".