1210010201021 has 4 divisors (see below), whose sum is σ = 1213254196572. Its totient is φ = 1206766205472.

The previous prime is 1210010200991. The next prime is 1210010201041. The reversal of 1210010201021 is 1201020100121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 268603792900 + 941406408121 = 518270^2 + 970261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210010201021 - 2¹⁰ = 1210010199997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210010200993 and 1210010201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210010201041) 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, 1621997216 + ... + 1621997961.

It is an arithmetic number, because the mean of its divisors is an integer number (303313549143).

Almost surely, 2^{1210010201021} is an apocalyptic number.

It is an amenable number.

1210010201021 is a deficient number, since it is larger than the sum of its proper divisors (3243995551).

1210010201021 is an equidigital number, since it uses as much as digits as its factorization.

1210010201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243995550.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1210010201021 its reverse (1201020100121), we get a palindrome (2411030301142).

The spelling of 1210010201021 in words is "one trillion, two hundred ten billion, ten million, two hundred one thousand, twenty-one".