202121001021010 has 16 divisors (see below), whose sum is σ = 363818319010776. Its totient is φ = 80848285481088.

The previous prime is 202121001020993. The next prime is 202121001021013. The reversal of 202121001021010 is 10120100121202.

It can be written as a sum of positive squares in 4 ways, for example, as 113881787314681 + 88239213706329 = 10671541^2 + 9393573^2 .

It is a super-2 number, since 2×202121001021010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202121001021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6789147 + ... + 21221086.

Almost surely, 2^{202121001021010} is an apocalyptic number.

202121001021010 is a deficient number, since it is larger than the sum of its proper divisors (161697317989766).

202121001021010 is a wasteful number, since it uses less digits than its factorization.

202121001021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28731837.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202121001021010 its reverse (10120100121202), we get a palindrome (212241101142212).

The spelling of 202121001021010 in words is "two hundred two trillion, one hundred twenty-one billion, one million, twenty-one thousand, ten".