1221121074 has 8 divisors (see below), whose sum is σ = 2442242160. Its totient is φ = 407040356.

The previous prime is 1221121073. The next prime is 1221121117. The reversal of 1221121074 is 4701211221.

It is a sphenic number, since it is the product of 3 distinct primes.

1221121074 is an admirable number.

It is a super-2 number, since 2×1221121074² = 2982273354733826952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221121074.

It is not an unprimeable number, because it can be changed into a prime (1221121073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101760084 + ... + 101760095.

It is an arithmetic number, because the mean of its divisors is an integer number (305280270).

Almost surely, 2^1221121074 is an apocalyptic number.

1221121074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221121074 is a wasteful number, since it uses less digits than its factorization.

1221121074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203520184.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1221121074 is about 34944.5428357562. The cubic root of 1221121074 is about 1068.8569252755.

Adding to 1221121074 its reverse (4701211221), we get a palindrome (5922332295).

The spelling of 1221121074 in words is "one billion, two hundred twenty-one million, one hundred twenty-one thousand, seventy-four".