20021012221210 has 1024 divisors, whose sum is σ = 52973744947200. Its totient is φ = 5250214195200.

The previous prime is 20021012221201. The next prime is 20021012221219. The reversal of 20021012221210 is 1212221012002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20021012221201) and next prime (20021012221219).

It is not an unprimeable number, because it can be changed into a prime (20021012221219) by changing a digit.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 45605950171 + ... + 45605950609.

It is an arithmetic number, because the mean of its divisors is an integer number (51732172800).

Almost surely, 2^{20021012221210} is an apocalyptic number.

20021012221210 is an abundant number, since it is smaller than the sum of its proper divisors (32952732725990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021012221210 is a wasteful number, since it uses less digits than its factorization.

20021012221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021012221210 its reverse (1212221012002), we get a palindrome (21233233233212).

The spelling of 20021012221210 in words is "twenty trillion, twenty-one billion, twelve million, two hundred twenty-one thousand, two hundred ten".