1021020001212 has 24 divisors (see below), whose sum is σ = 2382399475456. Its totient is φ = 340337218608.

The previous prime is 1021020001193. The next prime is 1021020001229. The reversal of 1021020001212 is 2121000201201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632813 + ... + 2169819.

Almost surely, 2^{1021020001212} is an apocalyptic number.

1021020001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021020001212 is an abundant number, since it is smaller than the sum of its proper divisors (1361379474244).

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

1021020001212 is a wasteful number, since it uses less digits than its factorization.

1021020001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695457 (or 695455 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021020001212 its reverse (2121000201201), we get a palindrome (3142020202413).

The spelling of 1021020001212 in words is "one trillion, twenty-one billion, twenty million, one thousand, two hundred twelve".