101221021098 has 12 divisors (see below), whose sum is σ = 219312212418. Its totient is φ = 33740340360.

The previous prime is 101221021091. The next prime is 101221021129. The reversal of 101221021098 is 890120122101.

It can be written as a sum of positive squares in only one way, i.e., 69520286889 + 31700734209 = 263667^2 + 178047^2 .

It is a super-2 number, since 2×101221021098² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101221021091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2811695013 + ... + 2811695048.

Almost surely, 2^101221021098 is an apocalyptic number.

101221021098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

101221021098 is an abundant number, since it is smaller than the sum of its proper divisors (118091191320).

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

101221021098 is a wasteful number, since it uses less digits than its factorization.

101221021098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5623390069 (or 5623390066 counting only the distinct ones).

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

Adding to 101221021098 its reverse (890120122101), we get a palindrome (991341143199).

The spelling of 101221021098 in words is "one hundred one billion, two hundred twenty-one million, twenty-one thousand, ninety-eight".