201034321021 has 4 divisors (see below), whose sum is σ = 202878672700. Its totient is φ = 199189969344.

The previous prime is 201034320983. The next prime is 201034321063. The reversal of 201034321021 is 120123430102.

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 168169707225 + 32864613796 = 410085^2 + 181286^2 .

It is a cyclic number.

It is not a de Polignac number, because 201034321021 - 2¹¹ = 201034318973 is a prime.

It is a super-3 number, since 3×201034321021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201034321021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201034321091) 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, 922175676 + ... + 922175893.

It is an arithmetic number, because the mean of its divisors is an integer number (50719668175).

Almost surely, 2^201034321021 is an apocalyptic number.

It is an amenable number.

201034321021 is a deficient number, since it is larger than the sum of its proper divisors (1844351679).

201034321021 is a wasteful number, since it uses less digits than its factorization.

201034321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844351678.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201034321021 its reverse (120123430102), we get a palindrome (321157751123).

The spelling of 201034321021 in words is "two hundred one billion, thirty-four million, three hundred twenty-one thousand, twenty-one".