2101201002020 has 12 divisors (see below), whose sum is σ = 4412522104284. Its totient is φ = 840480400800.

The previous prime is 2101201002013. The next prime is 2101201002023. The reversal of 2101201002020 is 202001021012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1571091778624 + 530109223396 = 1253432^2 + 728086^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2101201001992 and 2101201002010.

It is not an unprimeable number, because it can be changed into a prime (2101201002023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52530025031 + ... + 52530025070.

It is an arithmetic number, because the mean of its divisors is an integer number (367710175357).

Almost surely, 2^{2101201002020} is an apocalyptic number.

2101201002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101201002020 is an abundant number, since it is smaller than the sum of its proper divisors (2311321102264).

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

2101201002020 is a wasteful number, since it uses less digits than its factorization.

2101201002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105060050110 (or 105060050108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2101201002020 its reverse (202001021012), we get a palindrome (2303202023032).

The spelling of 2101201002020 in words is "two trillion, one hundred one billion, two hundred one million, two thousand, twenty".