21020222210210 has 32 divisors (see below), whose sum is σ = 38648456404992. Its totient is φ = 8227696962240.

The previous prime is 21020222210171. The next prime is 21020222210219. The reversal of 21020222210210 is 1201222202012.

It is a happy number.

It is a super-3 number, since 3×21020222210210³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21020222210219) 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, 1477181 + ... + 6650000.

It is an arithmetic number, because the mean of its divisors is an integer number (1207764262656).

Almost surely, 2^{21020222210210} is an apocalyptic number.

21020222210210 is a deficient number, since it is larger than the sum of its proper divisors (17628234194782).

21020222210210 is a wasteful number, since it uses less digits than its factorization.

21020222210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8132738.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21020222210210 its reverse (1201222202012), we get a palindrome (22221444412222).

The spelling of 21020222210210 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two hundred ten thousand, two hundred ten".