1020212221212 has 72 divisors (see below), whose sum is σ = 2734006783872. Its totient is φ = 320206089600.

The previous prime is 1020212221169. The next prime is 1020212221213. The reversal of 1020212221212 is 2121222120201.

It is a happy number.

1020212221212 is a `hidden beast` number, since 1 + 0 + 20 + 212 + 221 + 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 (1020212221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12312339 + ... + 12394922.

Almost surely, 2^{1020212221212} is an apocalyptic number.

1020212221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020212221212 is an abundant number, since it is smaller than the sum of its proper divisors (1713794562660).

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

1020212221212 is a wasteful number, since it uses less digits than its factorization.

1020212221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24707339 (or 24707334 counting only the distinct ones).

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

Adding to 1020212221212 its reverse (2121222120201), we get a palindrome (3141434341413).

The spelling of 1020212221212 in words is "one trillion, twenty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".