1001551220124 has 96 divisors (see below), whose sum is σ = 2879069953536. Its totient is φ = 263886370560.

The previous prime is 1001551220023. The next prime is 1001551220141. The reversal of 1001551220124 is 4210221551001.

It is a happy number.

1001551220124 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1001551220094 and 1001551220103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665779 + ... + 1564085.

It is an arithmetic number, because the mean of its divisors is an integer number (29990312016).

Almost surely, 2^{1001551220124} is an apocalyptic number.

1001551220124 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 1001551220124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439534976768).

1001551220124 is an abundant number, since it is smaller than the sum of its proper divisors (1877518733412).

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

1001551220124 is a wasteful number, since it uses less digits than its factorization.

1001551220124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899355 (or 899353 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 1001551220124 its reverse (4210221551001), we get a palindrome (5211772771125).

The spelling of 1001551220124 in words is "one trillion, one billion, five hundred fifty-one million, two hundred twenty thousand, one hundred twenty-four".