1221102030 has 32 divisors (see below), whose sum is σ = 2939522688. Its totient is φ = 324640800.

The previous prime is 1221102023. The next prime is 1221102041. The reversal of 1221102030 is 302011221.

It is a junction number, because it is equal to n+sod(n) for n = 1221101997 and 1221102015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51556 + ... + 71415.

It is an arithmetic number, because the mean of its divisors is an integer number (91860084).

Almost surely, 2^1221102030 is an apocalyptic number.

1221102030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221102030 is an abundant number, since it is smaller than the sum of its proper divisors (1718420658).

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

1221102030 is a wasteful number, since it uses less digits than its factorization.

1221102030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123312.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1221102030 is about 34944.2703457949. The cubic root of 1221102030 is about 1068.8513687921.

Adding to 1221102030 its reverse (302011221), we get a palindrome (1523113251).

The spelling of 1221102030 in words is "one billion, two hundred twenty-one million, one hundred two thousand, thirty".