1021111420 has 24 divisors (see below), whose sum is σ = 2450667744. Its totient is φ = 350095296.

The previous prime is 1021111363. The next prime is 1021111463. The reversal of 1021111420 is 241111201.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1021111420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3646687 + ... + 3646966.

It is an arithmetic number, because the mean of its divisors is an integer number (102111156).

Almost surely, 2^1021111420 is an apocalyptic number.

1021111420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021111420 is an abundant number, since it is smaller than the sum of its proper divisors (1429556324).

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

1021111420 is a wasteful number, since it uses less digits than its factorization.

1021111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7293669 (or 7293667 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1021111420 is about 31954.8340630960. The cubic root of 1021111420 is about 1006.9881914249.

Adding to 1021111420 its reverse (241111201), we get a palindrome (1262222621).

The spelling of 1021111420 in words is "one billion, twenty-one million, one hundred eleven thousand, four hundred twenty".