10202122102021 has 4 divisors (see below), whose sum is σ = 10303133212044. Its totient is φ = 10101110992000.

The previous prime is 10202122102001. The next prime is 10202122102037. The reversal of 10202122102021 is 12020122120201.

It is a happy number.

10202122102021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7744454488996 + 2457667613025 = 2782886^2 + 1567695^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202122102021 - 2⁵ = 10202122101989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202122101986 and 10202122102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202122102001) 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, 50505554860 + ... + 50505555061.

It is an arithmetic number, because the mean of its divisors is an integer number (2575783303011).

Almost surely, 2^{10202122102021} is an apocalyptic number.

It is an amenable number.

10202122102021 is a deficient number, since it is larger than the sum of its proper divisors (101011110023).

10202122102021 is a wasteful number, since it uses less digits than its factorization.

10202122102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101011110022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10202122102021 its reverse (12020122120201), we get a palindrome (22222244222222).

The spelling of 10202122102021 in words is "ten trillion, two hundred two billion, one hundred twenty-two million, one hundred two thousand, twenty-one".