1221504050 has 48 divisors (see below), whose sum is σ = 2456842752. Its totient is φ = 449160000.

The previous prime is 1221504047. The next prime is 1221504073. The reversal of 1221504050 is 504051221.

It is a super-3 number, since 3×1221504050³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159407 + ... + 166893.

It is an arithmetic number, because the mean of its divisors is an integer number (51184224).

Almost surely, 2^1221504050 is an apocalyptic number.

1221504050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221504050 is an abundant number, since it is smaller than the sum of its proper divisors (1235338702).

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

1221504050 is a wasteful number, since it uses less digits than its factorization.

1221504050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7763 (or 7758 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1221504050 is about 34950.0221745280. The cubic root of 1221504050 is about 1068.9686542357.

Adding to 1221504050 its reverse (504051221), we get a palindrome (1725555271).

The spelling of 1221504050 in words is "one billion, two hundred twenty-one million, five hundred four thousand, fifty".