221123523102 has 32 divisors (see below), whose sum is σ = 458260154880. Its totient is φ = 71082385920.

The previous prime is 221123523077. The next prime is 221123523119. The reversal of 221123523102 is 201325321122.

It is a super-2 number, since 2×221123523102² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 5404099 + ... + 5444862.

It is an arithmetic number, because the mean of its divisors is an integer number (14320629840).

Almost surely, 2^221123523102 is an apocalyptic number.

221123523102 is an abundant number, since it is smaller than the sum of its proper divisors (237136631778).

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

221123523102 is a wasteful number, since it uses less digits than its factorization.

221123523102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10849088.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 221123523102 its reverse (201325321122), we get a palindrome (422448844224).

The spelling of 221123523102 in words is "two hundred twenty-one billion, one hundred twenty-three million, five hundred twenty-three thousand, one hundred two".