1221053050 has 144 divisors (see below), whose sum is σ = 2946507840. Its totient is φ = 373040640.

The previous prime is 1221053047. The next prime is 1221053059. The reversal of 1221053050 is 503501221.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1221053059) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 790579 + ... + 792121.

It is an arithmetic number, because the mean of its divisors is an integer number (20461860).

Almost surely, 2^1221053050 is an apocalyptic number.

1221053050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221053050 is an abundant number, since it is smaller than the sum of its proper divisors (1725454790).

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

1221053050 is a wasteful number, since it uses less digits than its factorization.

1221053050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1593 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1221053050 is about 34943.5695085662. The cubic root of 1221053050 is about 1068.8370775921.

Adding to 1221053050 its reverse (503501221), we get a palindrome (1724554271).

The spelling of 1221053050 in words is "one billion, two hundred twenty-one million, fifty-three thousand, fifty".