1011012021 has 48 divisors (see below), whose sum is σ = 1594944000. Its totient is φ = 614770560.

The previous prime is 1011011999. The next prime is 1011012031. The reversal of 1011012021 is 1202101101.

It is a happy number.

1011012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011012021 - 2⁶ = 1011011957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1011011994 and 1011012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011012031) 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, 1425615 + ... + 1426323.

It is an arithmetic number, because the mean of its divisors is an integer number (33228000).

Almost surely, 2^1011012021 is an apocalyptic number.

It is an amenable number.

1011012021 is a deficient number, since it is larger than the sum of its proper divisors (583931979).

1011012021 is a wasteful number, since it uses less digits than its factorization.

1011012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1011012021 is about 31796.4152224744. The cubic root of 1011012021 is about 1003.6572816513.

Adding to 1011012021 its reverse (1202101101), we get a palindrome (2213113122).

The spelling of 1011012021 in words is "one billion, eleven million, twelve thousand, twenty-one".