1021200020212 has 12 divisors (see below), whose sum is σ = 1789811876160. Its totient is φ = 509825198456.

The previous prime is 1021200020201. The next prime is 1021200020219. The reversal of 1021200020212 is 2120200021201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021200020192 and 1021200020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021200020219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193699948 + ... + 193705219.

It is an arithmetic number, because the mean of its divisors is an integer number (149150989680).

Almost surely, 2^{1021200020212} is an apocalyptic number.

It is an amenable number.

1021200020212 is a deficient number, since it is larger than the sum of its proper divisors (768611855948).

1021200020212 is a wasteful number, since it uses less digits than its factorization.

1021200020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387405830 (or 387405828 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1021200020212 its reverse (2120200021201), we get a palindrome (3141400041413).

The spelling of 1021200020212 in words is "one trillion, twenty-one billion, two hundred million, twenty thousand, two hundred twelve".