202021021010 has 16 divisors (see below), whose sum is σ = 363643655256. Its totient is φ = 80807115648.

The previous prime is 202021021009. The next prime is 202021021051. The reversal of 202021021010 is 10120120202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 160079209801 + 41941811209 = 400099^2 + 204797^2 .

It is a super-2 number, since 2×202021021010² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202021020982 and 202021021000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727892 + ... + 966368.

Almost surely, 2^202021021010 is an apocalyptic number.

202021021010 is a deficient number, since it is larger than the sum of its proper divisors (161622634246).

202021021010 is a wasteful number, since it uses less digits than its factorization.

202021021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323197.

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

Adding to 202021021010 its reverse (10120120202), we get a palindrome (212141141212).

The spelling of 202021021010 in words is "two hundred two billion, twenty-one million, twenty-one thousand, ten".