201021010 has 16 divisors (see below), whose sum is σ = 363187800. Its totient is φ = 80108416.

The previous prime is 201020987. The next prime is 201021043. The reversal of 201021010 is 10120102.

It can be written as a sum of positive squares in 4 ways, for example, as 103978809 + 97042201 = 10197^2 + 9851^2 .

It is a super-2 number, since 2×201021010² = 80818892922840200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201020984 and 201021002.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34675 + ... + 40054.

Almost surely, 2^201021010 is an apocalyptic number.

201021010 is a deficient number, since it is larger than the sum of its proper divisors (162166790).

201021010 is a wasteful number, since it uses less digits than its factorization.

201021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75005.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 201021010 is about 14178.1878249655. The cubic root of 201021010 is about 585.7970094485.

Adding to 201021010 its reverse (10120102), we get a palindrome (211141112).

It can be divided in two parts, 20102 and 1010, that added together give a palindrome (21112).

The spelling of 201021010 in words is "two hundred one million, twenty-one thousand, ten".