1021222220122 has 24 divisors (see below), whose sum is σ = 1704598373268. Its totient is φ = 456129020160.

The previous prime is 1021222220071. The next prime is 1021222220129. The reversal of 1021222220122 is 2210222221201.

It can be written as a sum of positive squares in 2 ways, for example, as 991396584721 + 29825635401 = 995689^2 + 172701^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021222220122.

It is not an unprimeable number, because it can be changed into a prime (1021222220129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20410903 + ... + 20460874.

Almost surely, 2^{1021222220122} is an apocalyptic number.

1021222220122 is a deficient number, since it is larger than the sum of its proper divisors (683376153146).

1021222220122 is a wasteful number, since it uses less digits than its factorization.

1021222220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40871854 (or 40871823 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1021222220122 its reverse (2210222221201), we get a palindrome (3231444441323).

The spelling of 1021222220122 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-two".