1220691896424 has 384 divisors, whose sum is σ = 4699994906880. Its totient is φ = 275457024000.

The previous prime is 1220691896401. The next prime is 1220691896429. The reversal of 1220691896424 is 4246981960221.

1220691896424 is a `hidden beast` number, since 1 + 2 + 206 + 9 + 1 + 8 + 9 + 6 + 424 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1220691896429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 727074 + ... + 1723374.

It is an arithmetic number, because the mean of its divisors is an integer number (12239570070).

Almost surely, 2^{1220691896424} is an apocalyptic number.

1220691896424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220691896424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349997453440).

1220691896424 is an abundant number, since it is smaller than the sum of its proper divisors (3479303010456).

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

1220691896424 is a wasteful number, since it uses less digits than its factorization.

1220691896424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996361 (or 996354 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 1220691896424 in words is "one trillion, two hundred twenty billion, six hundred ninety-one million, eight hundred ninety-six thousand, four hundred twenty-four".