20021210210203 has 16 divisors (see below), whose sum is σ = 21547980546336. Its totient is φ = 18533267274240.

The previous prime is 20021210210137. The next prime is 20021210210251. The reversal of 20021210210203 is 30201201212002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20021210210203 - 2²⁹ = 20020673339291 is a prime.

It is a super-2 number, since 2×20021210210203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021210210273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14092225 + ... + 15447757.

It is an arithmetic number, because the mean of its divisors is an integer number (1346748784146).

Almost surely, 2^{20021210210203} is an apocalyptic number.

20021210210203 is a deficient number, since it is larger than the sum of its proper divisors (1526770336133).

20021210210203 is a wasteful number, since it uses less digits than its factorization.

20021210210203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369854.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20021210210203 its reverse (30201201212002), we get a palindrome (50222411422205).

The spelling of 20021210210203 in words is "twenty trillion, twenty-one billion, two hundred ten million, two hundred ten thousand, two hundred three".