1002111420 has 96 divisors (see below), whose sum is σ = 2844072000. Its totient is φ = 263624704.

The previous prime is 1002111413. The next prime is 1002111491. The reversal of 1002111420 is 241112001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1002111396 and 1002111405.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1760896 + ... + 1761464.

It is an arithmetic number, because the mean of its divisors is an integer number (29625750).

Almost surely, 2^1002111420 is an apocalyptic number.

1002111420 is a gapful number since it is divisible by the number (10) 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 1002111420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422036000).

1002111420 is an abundant number, since it is smaller than the sum of its proper divisors (1841960580).

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

1002111420 is a wasteful number, since it uses less digits than its factorization.

1002111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1002111420 is about 31656.1434795839. The cubic root of 1002111420 is about 1000.7033119031.

Adding to 1002111420 its reverse (241112001), we get a palindrome (1243223421).

The spelling of 1002111420 in words is "one billion, two million, one hundred eleven thousand, four hundred twenty".