1021122220212 has 36 divisors (see below), whose sum is σ = 2717021114080. Its totient is φ = 322459648272.

The previous prime is 1021122220177. The next prime is 1021122220213. The reversal of 1021122220212 is 2120222211201.

It is a happy number.

1021122220212 is a `hidden beast` number, since 1 + 0 + 211 + 22 + 220 + 212 = 666.

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

It is a super-2 number, since 2×1021122220212² (a number of 25 digits) contains 22 as substring.

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 (1021122220213) 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, 746433688 + ... + 746435055.

Almost surely, 2^{1021122220212} is an apocalyptic number.

1021122220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021122220212 is an abundant number, since it is smaller than the sum of its proper divisors (1695898893868).

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

1021122220212 is a wasteful number, since it uses less digits than its factorization.

1021122220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492868772 (or 1492868767 counting only the distinct ones).

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

Adding to 1021122220212 its reverse (2120222211201), we get a palindrome (3141344431413).

The spelling of 1021122220212 in words is "one trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twelve".