1020002100220 has 24 divisors (see below), whose sum is σ = 2142783720000. Its totient is φ = 407852400192.

The previous prime is 1020002100203. The next prime is 1020002100233. The reversal of 1020002100220 is 220012000201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1020002100197 and 1020002100206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9221140 + ... + 9331099.

It is an arithmetic number, because the mean of its divisors is an integer number (89282655000).

Almost surely, 2^{1020002100220} is an apocalyptic number.

1020002100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020002100220 is an abundant number, since it is smaller than the sum of its proper divisors (1122781619780).

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

1020002100220 is a wasteful number, since it uses less digits than its factorization.

1020002100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18554997 (or 18554995 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1020002100220 its reverse (220012000201), we get a palindrome (1240014100421).

The spelling of 1020002100220 in words is "one trillion, twenty billion, two million, one hundred thousand, two hundred twenty".