1221223102 has 16 divisors (see below), whose sum is σ = 1998911232. Its totient is φ = 554949720.

The previous prime is 1221223097. The next prime is 1221223103. The reversal of 1221223102 is 2013221221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221223103) 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, 131083 + ... + 140089.

It is an arithmetic number, because the mean of its divisors is an integer number (124931952).

Almost surely, 2^1221223102 is an apocalyptic number.

1221223102 is a deficient number, since it is larger than the sum of its proper divisors (777688130).

1221223102 is a wasteful number, since it uses less digits than its factorization.

1221223102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15183.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221223102 is about 34946.0026612487. The cubic root of 1221223102 is about 1068.8866930847.

Adding to 1221223102 its reverse (2013221221), we get a palindrome (3234444323).

The spelling of 1221223102 in words is "one billion, two hundred twenty-one million, two hundred twenty-three thousand, one hundred two".