101220002020 has 12 divisors (see below), whose sum is σ = 212562004284. Its totient is φ = 40488000800.

The previous prime is 101220002011. The next prime is 101220002063. The reversal of 101220002020 is 20200022101.

It can be written as a sum of positive squares in 2 ways, for example, as 41045949604 + 60174052416 = 202598^2 + 245304^2 .

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 = 101220001988 and 101220002006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2530500031 + ... + 2530500070.

It is an arithmetic number, because the mean of its divisors is an integer number (17713500357).

Almost surely, 2^101220002020 is an apocalyptic number.

101220002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220002020 is an abundant number, since it is smaller than the sum of its proper divisors (111342002264).

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

101220002020 is a wasteful number, since it uses less digits than its factorization.

101220002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061000110 (or 5061000108 counting only the distinct ones).

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

Adding to 101220002020 its reverse (20200022101), we get a palindrome (121420024121).

The spelling of 101220002020 in words is "one hundred one billion, two hundred twenty million, two thousand, twenty".