1021022212212 has 36 divisors (see below), whose sum is σ = 2581074683460. Its totient is φ = 340319978112.

The previous prime is 1021022212163. The next prime is 1021022212213. The reversal of 1021022212212 is 2122122201201.

It is a happy number.

1021022212212 is a `hidden beast` number, since 10 + 210 + 2 + 221 + 221 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 903705001956 + 117317210256 = 950634^2 + 342516^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (1021022212213) 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, 260787 + ... + 1452602.

It is an arithmetic number, because the mean of its divisors is an integer number (71696518985).

Almost surely, 2^{1021022212212} is an apocalyptic number.

1021022212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021022212212 is an abundant number, since it is smaller than the sum of its proper divisors (1560052471248).

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

1021022212212 is a wasteful number, since it uses less digits than its factorization.

1021022212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729952 (or 1729947 counting only the distinct ones).

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

Adding to 1021022212212 its reverse (2122122201201), we get a palindrome (3143144413413).

The spelling of 1021022212212 in words is "one trillion, twenty-one billion, twenty-two million, two hundred twelve thousand, two hundred twelve".