21112021122010 has 64 divisors (see below), whose sum is σ = 47653723256832. Its totient is φ = 6555538619136.

The previous prime is 21112021121981. The next prime is 21112021122011. The reversal of 21112021122010 is 1022112021112.

It is not an unprimeable number, because it can be changed into a prime (21112021122011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218819914 + ... + 218916373.

It is an arithmetic number, because the mean of its divisors is an integer number (744589425888).

Almost surely, 2^{21112021122010} is an apocalyptic number.

21112021122010 is an abundant number, since it is smaller than the sum of its proper divisors (26541702134822).

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

21112021122010 is a wasteful number, since it uses less digits than its factorization.

21112021122010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437736367.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112021122010 its reverse (1022112021112), we get a palindrome (22134133143122).

The spelling of 21112021122010 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred twenty-two thousand, ten".