1020100021002 has 96 divisors (see below), whose sum is σ = 2267314882560. Its totient is φ = 331317112320.

The previous prime is 1020100020967. The next prime is 1020100021009. The reversal of 1020100021002 is 2001200010201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1020100021009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186453127 + ... + 186458597.

It is an arithmetic number, because the mean of its divisors is an integer number (23617863360).

Almost surely, 2^{1020100021002} is an apocalyptic number.

1020100021002 is an abundant number, since it is smaller than the sum of its proper divisors (1247214861558).

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

1020100021002 is a wasteful number, since it uses less digits than its factorization.

1020100021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468 (or 6465 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1020100021002 its reverse (2001200010201), we get a palindrome (3021300031203).

The spelling of 1020100021002 in words is "one trillion, twenty billion, one hundred million, twenty-one thousand, two".