1010111021 has 4 divisors (see below), whose sum is σ = 1010181312. Its totient is φ = 1010040732.

The previous prime is 1010110967. The next prime is 1010111057. The reversal of 1010111021 is 1201110101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1010111021 - 2²⁶ = 943002157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010111621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4931 + ... + 45216.

It is an arithmetic number, because the mean of its divisors is an integer number (252545328).

Almost surely, 2^1010111021 is an apocalyptic number.

It is an amenable number.

1010111021 is a deficient number, since it is larger than the sum of its proper divisors (70291).

1010111021 is an equidigital number, since it uses as much as digits as its factorization.

1010111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70290.

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

The square root of 1010111021 is about 31782.2438005878. The cubic root of 1010111021 is about 1003.3590445197.

Adding to 1010111021 its reverse (1201110101), we get a palindrome (2211221122).

The spelling of 1010111021 in words is "one billion, ten million, one hundred eleven thousand, twenty-one".