221123120202 has 96 divisors (see below), whose sum is σ = 524504697600. Its totient is φ = 67080783744.

The previous prime is 221123120177. The next prime is 221123120299. The reversal of 221123120202 is 202021321122.

221123120202 is a `hidden beast` number, since 2 + 211 + 231 + 20 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 889068 + ... + 1110264.

It is an arithmetic number, because the mean of its divisors is an integer number (5463590600).

Almost surely, 2^221123120202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221123120202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262252348800).

221123120202 is an abundant number, since it is smaller than the sum of its proper divisors (303381577398).

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

221123120202 is a wasteful number, since it uses less digits than its factorization.

221123120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221340 (or 221337 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221123120202 its reverse (202021321122), we get a palindrome (423144441324).

The spelling of 221123120202 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred twenty thousand, two hundred two".