20222121210 has 16 divisors (see below), whose sum is σ = 48533090976. Its totient is φ = 5392565648.

The previous prime is 20222121181. The next prime is 20222121217. The reversal of 20222121210 is 1212122202.

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 20222121210.

It is not an unprimeable number, because it can be changed into a prime (20222121217) 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, 337035324 + ... + 337035383.

It is an arithmetic number, because the mean of its divisors is an integer number (3033318186).

Almost surely, 2^20222121210 is an apocalyptic number.

20222121210 is an abundant number, since it is smaller than the sum of its proper divisors (28310969766).

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

20222121210 is a wasteful number, since it uses less digits than its factorization.

20222121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674070717.

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

Adding to 20222121210 its reverse (1212122202), we get a palindrome (21434243412).

The spelling of 20222121210 in words is "twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred ten".