1321023102 has 32 divisors (see below), whose sum is σ = 3047193600. Its totient is φ = 373971168.

The previous prime is 1321023061. The next prime is 1321023107. The reversal of 1321023102 is 2013201231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321023107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139702 + ... + 148857.

It is an arithmetic number, because the mean of its divisors is an integer number (95224800).

Almost surely, 2^1321023102 is an apocalyptic number.

1321023102 is an abundant number, since it is smaller than the sum of its proper divisors (1726170498).

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

1321023102 is a wasteful number, since it uses less digits than its factorization.

1321023102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288680.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321023102 is about 36345.8814998343. The cubic root of 1321023102 is about 1097.2446472234.

Adding to 1321023102 its reverse (2013201231), we get a palindrome (3334224333).

It can be divided in two parts, 1321023 and 102, that added together give a triangular number (1321125 = T₁₆₂₅).

The spelling of 1321023102 in words is "one billion, three hundred twenty-one million, twenty-three thousand, one hundred two".