1021222120212 has 144 divisors (see below), whose sum is σ = 2956358950272. Its totient is φ = 291169105920.

The previous prime is 1021222120211. The next prime is 1021222120277. The reversal of 1021222120212 is 2120212221201.

It is a happy number.

1021222120212 is a `hidden beast` number, since 1 + 0 + 212 + 221 + 20 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021222120211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 387853648 + ... + 387856280.

It is an arithmetic number, because the mean of its divisors is an integer number (20530270488).

Almost surely, 2^{1021222120212} is an apocalyptic number.

1021222120212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021222120212 is an abundant number, since it is smaller than the sum of its proper divisors (1935136830060).

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

1021222120212 is a wasteful number, since it uses less digits than its factorization.

1021222120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278 (or 5273 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1021222120212 its reverse (2120212221201), we get a palindrome (3141434341413).

The spelling of 1021222120212 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twelve".