1221037350 has 48 divisors (see below), whose sum is σ = 3261114192. Its totient is φ = 300562560.

The previous prime is 1221037343. The next prime is 1221037357. The reversal of 1221037350 is 537301221.

It is an interprime number because it is at equal distance from previous prime (1221037343) and next prime (1221037357).

It is a self number, because there is not a number n which added to its sum of digits gives 1221037350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221037357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311137 + ... + 315036.

It is an arithmetic number, because the mean of its divisors is an integer number (67939879).

Almost surely, 2^1221037350 is an apocalyptic number.

1221037350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221037350 is an abundant number, since it is smaller than the sum of its proper divisors (2040076842).

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

1221037350 is a wasteful number, since it uses less digits than its factorization.

1221037350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626201 (or 626196 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1221037350 is about 34943.3448599301. The cubic root of 1221037350 is about 1068.8324966243.

Adding to 1221037350 its reverse (537301221), we get a palindrome (1758338571).

The spelling of 1221037350 in words is "one billion, two hundred twenty-one million, thirty-seven thousand, three hundred fifty".