1011021011 has 48 divisors (see below), whose sum is σ = 1403990784. Its totient is φ = 703080000.

The previous prime is 1011021007. The next prime is 1011021013. The reversal of 1011021011 is 1101201101.

It is a happy number.

It is not a de Polignac number, because 1011021011 - 2² = 1011021007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011021011.

It is not an unprimeable number, because it can be changed into a prime (1011021013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 961436 + ... + 962486.

It is an arithmetic number, because the mean of its divisors is an integer number (29249808).

Almost surely, 2^1011021011 is an apocalyptic number.

1011021011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1011021011 is a deficient number, since it is larger than the sum of its proper divisors (392969773).

1011021011 is a wasteful number, since it uses less digits than its factorization.

1011021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1011021011 is about 31796.5565902976. The cubic root of 1011021011 is about 1003.6602565095.

Adding to 1011021011 its reverse (1101201101), we get a palindrome (2112222112).

The spelling of 1011021011 in words is "one billion, eleven million, twenty-one thousand, eleven".