221031102 has 16 divisors (see below), whose sum is σ = 443826432. Its totient is φ = 73383000.

The previous prime is 221031101. The next prime is 221031119. The reversal of 221031102 is 201130122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221031101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71878 + ... + 74889.

It is an arithmetic number, because the mean of its divisors is an integer number (27739152).

Almost surely, 2^221031102 is an apocalyptic number.

221031102 is an abundant number, since it is smaller than the sum of its proper divisors (222795330).

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

221031102 is a wasteful number, since it uses less digits than its factorization.

221031102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147023.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221031102 is about 14867.1147839788. The cubic root of 221031102 is about 604.6227204032.

Adding to 221031102 its reverse (201130122), we get a palindrome (422161224).

The spelling of 221031102 in words is "two hundred twenty-one million, thirty-one thousand, one hundred two".