201010022021 has 4 divisors (see below), whose sum is σ = 201011355372. Its totient is φ = 201008688672.

The previous prime is 201010021999. The next prime is 201010022023. The reversal of 201010022021 is 120220010102.

It is a happy number.

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 78800349796 + 122209672225 = 280714^2 + 349585^2 .

It is a cyclic number.

It is not a de Polignac number, because 201010022021 - 2⁶ = 201010021957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201010021993 and 201010022011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010022023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406766 + ... + 753311.

It is an arithmetic number, because the mean of its divisors is an integer number (50252838843).

Almost surely, 2^201010022021 is an apocalyptic number.

It is an amenable number.

201010022021 is a deficient number, since it is larger than the sum of its proper divisors (1333351).

201010022021 is a wasteful number, since it uses less digits than its factorization.

201010022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333350.

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

Adding to 201010022021 its reverse (120220010102), we get a palindrome (321230032123).

The spelling of 201010022021 in words is "two hundred one billion, ten million, twenty-two thousand, twenty-one".