1020020021212 has 48 divisors (see below), whose sum is σ = 1899202443264. Its totient is φ = 478629144000.

The previous prime is 1020020021203. The next prime is 1020020021213. The reversal of 1020020021212 is 2121200200201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020021192 and 1020020021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020021213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412618 + ... + 1486705.

It is an arithmetic number, because the mean of its divisors is an integer number (39566717568).

Almost surely, 2^{1020020021212} is an apocalyptic number.

It is an amenable number.

1020020021212 is a deficient number, since it is larger than the sum of its proper divisors (879182422052).

1020020021212 is a wasteful number, since it uses less digits than its factorization.

1020020021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899490 (or 1899488 counting only the distinct ones).

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

Adding to 1020020021212 its reverse (2121200200201), we get a palindrome (3141220221413).

The spelling of 1020020021212 in words is "one trillion, twenty billion, twenty million, twenty-one thousand, two hundred twelve".