1020002021112 has 32 divisors (see below), whose sum is σ = 2575252633680. Its totient is φ = 336634329600.

The previous prime is 1020002021107. The next prime is 1020002021117. The reversal of 1020002021112 is 2111202000201.

It is an interprime number because it is at equal distance from previous prime (1020002021107) and next prime (1020002021117).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020002021117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210394033 + ... + 210398880.

Almost surely, 2^{1020002021112} is an apocalyptic number.

1020002021112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020002021112 is an abundant number, since it is smaller than the sum of its proper divisors (1555250612568).

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

1020002021112 is a wasteful number, since it uses less digits than its factorization.

1020002021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420793023 (or 420793019 counting only the distinct ones).

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

Adding to 1020002021112 its reverse (2111202000201), we get a palindrome (3131204021313).

The spelling of 1020002021112 in words is "one trillion, twenty billion, two million, twenty-one thousand, one hundred twelve".