2181021098 has 8 divisors (see below), whose sum is σ = 3312943680. Its totient is φ = 1076706540.

The previous prime is 2181021091. The next prime is 2181021109. The reversal of 2181021098 is 8901201812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2181021098² = 9513706059842251208, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2181021091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6901808 + ... + 6902123.

It is an arithmetic number, because the mean of its divisors is an integer number (414117960).

Almost surely, 2^2181021098 is an apocalyptic number.

2181021098 is a deficient number, since it is larger than the sum of its proper divisors (1131922582).

2181021098 is a wasteful number, since it uses less digits than its factorization.

2181021098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13804012.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 2181021098 is about 46701.4035977507. The cubic root of 2181021098 is about 1296.8406710518.

The spelling of 2181021098 in words is "two billion, one hundred eighty-one million, twenty-one thousand, ninety-eight".