1021011144 has 16 divisors (see below), whose sum is σ = 2552527920. Its totient is φ = 340337040.

The previous prime is 1021011097. The next prime is 1021011157. The reversal of 1021011144 is 4411101201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21271042 + ... + 21271089.

It is an arithmetic number, because the mean of its divisors is an integer number (159532995).

Almost surely, 2^1021011144 is an apocalyptic number.

It is an amenable number.

1021011144 is an abundant number, since it is smaller than the sum of its proper divisors (1531516776).

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

1021011144 is a wasteful number, since it uses less digits than its factorization.

1021011144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42542140 (or 42542136 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1021011144 is about 31953.2649974928. The cubic root of 1021011144 is about 1006.9552273260.

Adding to 1021011144 its reverse (4411101201), we get a palindrome (5432112345).

The spelling of 1021011144 in words is "one billion, twenty-one million, eleven thousand, one hundred forty-four".