1021222221202 has 16 divisors (see below), whose sum is σ = 1646763719040. Its totient is φ = 473444567568.

The previous prime is 1021222221193. The next prime is 1021222221247. The reversal of 1021222221202 is 2021222221201.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1021222221202.

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, 285894693 + ... + 285898264.

It is an arithmetic number, because the mean of its divisors is an integer number (102922732440).

Almost surely, 2^{1021222221202} is an apocalyptic number.

1021222221202 is a deficient number, since it is larger than the sum of its proper divisors (625541497838).

1021222221202 is a wasteful number, since it uses less digits than its factorization.

1021222221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571793025.

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

Adding to 1021222221202 its reverse (2021222221201), we get a palindrome (3042444442403).

Subtracting 1021222221202 from its reverse (2021222221201), we obtain a palindrome (999999999999).

The spelling of 1021222221202 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred two".