1231102102 has 4 divisors (see below), whose sum is σ = 1846653156. Its totient is φ = 615551050.

The previous prime is 1231102079. The next prime is 1231102111. The reversal of 1231102102 is 2012011321.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1231102102² = 3031224771097636808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307775524 + ... + 307775527.

It is an arithmetic number, because the mean of its divisors is an integer number (461663289).

Almost surely, 2^1231102102 is an apocalyptic number.

1231102102 is a deficient number, since it is larger than the sum of its proper divisors (615551054).

1231102102 is an equidigital number, since it uses as much as digits as its factorization.

1231102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615551053.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1231102102 is about 35087.0645965148. The cubic root of 1231102102 is about 1071.7611843406.

Adding to 1231102102 its reverse (2012011321), we get a palindrome (3243113423).

The spelling of 1231102102 in words is "one billion, two hundred thirty-one million, one hundred two thousand, one hundred two".