1223121102 has 64 divisors (see below), whose sum is σ = 2875557888. Its totient is φ = 339552000.

The previous prime is 1223121043. The next prime is 1223121127. The reversal of 1223121102 is 2011213221.

1223121102 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465352 + ... + 467972.

It is an arithmetic number, because the mean of its divisors is an integer number (44930592).

Almost surely, 2^1223121102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223121102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437778944).

1223121102 is an abundant number, since it is smaller than the sum of its proper divisors (1652436786).

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

1223121102 is a wasteful number, since it uses less digits than its factorization.

1223121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1223121102 is about 34973.1482998028. The cubic root of 1223121102 is about 1069.4401537462.

Adding to 1223121102 its reverse (2011213221), we get a palindrome (3234334323).

It can be divided in two parts, 12231 and 21102, that added together give a palindrome (33333).

The spelling of 1223121102 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, one hundred two".