1020002121112 has 32 divisors (see below), whose sum is σ = 2059686266400. Its totient is φ = 470754987264.

The previous prime is 1020002121091. The next prime is 1020002121113. The reversal of 1020002121112 is 2111212000201.

It is a super-2 number, since 2×1020002121112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1020002121092 and 1020002121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020002121113) 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, 3470613 + ... + 3753019.

It is an arithmetic number, because the mean of its divisors is an integer number (64365195825).

Almost surely, 2^{1020002121112} is an apocalyptic number.

It is an amenable number.

1020002121112 is an abundant number, since it is smaller than the sum of its proper divisors (1039684145288).

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

1020002121112 is a wasteful number, since it uses less digits than its factorization.

1020002121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317155 (or 317151 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1020002121112 its reverse (2111212000201), we get a palindrome (3131214121313).

The spelling of 1020002121112 in words is "one trillion, twenty billion, two million, one hundred twenty-one thousand, one hundred twelve".