1012021011 has 12 divisors (see below), whose sum is σ = 1465387560.
Its totient is φ = 673028640.
The previous prime is 1012021001. The next prime is 1012021019. The reversal of 1012021011 is 1101202101.
It is a happy number.
1012021011 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 1012021011 - 25 = 1012020979 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 = 1012020984 and 1012021002.
It is not an unprimeable number, because it can be changed into a prime (1012021019) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133785 + ... + 141146.
It is an arithmetic number, because the mean of its divisors is an integer number (122115630).
Almost surely, 21012021011 is an apocalyptic number.
1012021011 is a deficient number, since it is larger than the sum of its proper divisors (453366549).
1012021011 is a wasteful number, since it uses less digits than its factorization.
1012021011 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 275346 (or 275343 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 1012021011 is about 31812.2776770228.
The cubic root of 1012021011 is about 1003.9910539644.
Adding to 1012021011 its reverse (1101202101), we get a palindrome (2113223112).
The spelling of 1012021011 in words is "one billion, twelve million, twenty-one thousand, eleven".