1221331102 has 8 divisors (see below), whose sum is σ = 1939761216. Its totient is φ = 574744032.

The previous prime is 1221331079. The next prime is 1221331109. The reversal of 1221331102 is 2011331221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221331109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17960718 + ... + 17960785.

It is an arithmetic number, because the mean of its divisors is an integer number (242470152).

Almost surely, 2^1221331102 is an apocalyptic number.

1221331102 is a deficient number, since it is larger than the sum of its proper divisors (718430114).

1221331102 is a wasteful number, since it uses less digits than its factorization.

1221331102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35921522.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1221331102 is about 34947.5478681981. The cubic root of 1221331102 is about 1068.9182014853.

Adding to 1221331102 its reverse (2011331221), we get a palindrome (3232662323).

The spelling of 1221331102 in words is "one billion, two hundred twenty-one million, three hundred thirty-one thousand, one hundred two".