1220074821 has 12 divisors (see below), whose sum is σ = 2014091872. Its totient is φ = 697185576.

The previous prime is 1220074811. The next prime is 1220074831. The reversal of 1220074821 is 1284700221.

It is an interprime number because it is at equal distance from previous prime (1220074811) and next prime (1220074831).

It is not a de Polignac number, because 1220074821 - 2¹⁰ = 1220073797 is a prime.

It is a super-3 number, since 3×1220074821³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220074811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9683071 + ... + 9683196.

Almost surely, 2^1220074821 is an apocalyptic number.

It is an amenable number.

1220074821 is a deficient number, since it is larger than the sum of its proper divisors (794017051).

1220074821 is a wasteful number, since it uses less digits than its factorization.

1220074821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19366280 (or 19366277 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1220074821 is about 34929.5694362241. The cubic root of 1220074821 is about 1068.5515735447.

The spelling of 1220074821 in words is "one billion, two hundred twenty million, seventy-four thousand, eight hundred twenty-one".