1020202121012 has 12 divisors (see below), whose sum is σ = 1785361350276. Its totient is φ = 510098878080.

The previous prime is 1020202120991. The next prime is 1020202121017. The reversal of 1020202121012 is 2101212020201.

It can be written as a sum of positive squares in 2 ways, for example, as 367813138576 + 652388982436 = 606476^2 + 807706^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020202121017) 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, 980438 + ... + 1732530.

It is an arithmetic number, because the mean of its divisors is an integer number (148780112523).

Almost surely, 2^{1020202121012} is an apocalyptic number.

It is an amenable number.

1020202121012 is a deficient number, since it is larger than the sum of its proper divisors (765159229264).

1020202121012 is a wasteful number, since it uses less digits than its factorization.

1020202121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091218 (or 1091216 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1020202121012 its reverse (2101212020201), we get a palindrome (3121414141213).

The spelling of 1020202121012 in words is "one trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, twelve".