981021220110 has 96 divisors (see below), whose sum is σ = 2704095044352. Its totient is φ = 246324395520.

The previous prime is 981021220051. The next prime is 981021220237. The reversal of 981021220110 is 11022120189.

It is a super-2 number, since 2×981021220110² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4648399 + ... + 4854858.

It is an arithmetic number, because the mean of its divisors is an integer number (28167656712).

Almost surely, 2^981021220110 is an apocalyptic number.

981021220110 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

981021220110 is an abundant number, since it is smaller than the sum of its proper divisors (1723073824242).

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

981021220110 is a wasteful number, since it uses less digits than its factorization.

981021220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503338 (or 9503335 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

Adding to 981021220110 its reverse (11022120189), we get a palindrome (992043340299).

The spelling of 981021220110 in words is "nine hundred eighty-one billion, twenty-one million, two hundred twenty thousand, one hundred ten".