1021134420 has 72 divisors (see below), whose sum is σ = 3197376000. Its totient is φ = 263517120.

The previous prime is 1021134409. The next prime is 1021134421. The reversal of 1021134420 is 244311201.

1021134420 is a `hidden beast` number, since 1 + 0 + 211 + 34 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021134393 and 1021134402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021134421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85920 + ... + 97079.

It is an arithmetic number, because the mean of its divisors is an integer number (44408000).

Almost surely, 2^1021134420 is an apocalyptic number.

1021134420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021134420 is an abundant number, since it is smaller than the sum of its proper divisors (2176241580).

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

1021134420 is a wasteful number, since it uses less digits than its factorization.

1021134420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183045 (or 183040 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1021134420 is about 31955.1939440211. The cubic root of 1021134420 is about 1006.9957519954.

Adding to 1021134420 its reverse (244311201), we get a palindrome (1265445621).

The spelling of 1021134420 in words is "one billion, twenty-one million, one hundred thirty-four thousand, four hundred twenty".