1012230021 has 16 divisors (see below), whose sum is σ = 1472869440. Its totient is φ = 613249920.

The previous prime is 1012229993. The next prime is 1012230029. The reversal of 1012230021 is 1200322101.

It is not a de Polignac number, because 1012230021 - 2⁵ = 1012229989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012229979 and 1012230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012230029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160891 + ... + 167063.

It is an arithmetic number, because the mean of its divisors is an integer number (92054340).

Almost surely, 2^1012230021 is an apocalyptic number.

1012230021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012230021 is a deficient number, since it is larger than the sum of its proper divisors (460639419).

1012230021 is a wasteful number, since it uses less digits than its factorization.

1012230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11156.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1012230021 is about 31815.5625598543. The cubic root of 1012230021 is about 1004.0601664049.

Adding to 1012230021 its reverse (1200322101), we get a palindrome (2212552122).

The spelling of 1012230021 in words is "one billion, twelve million, two hundred thirty thousand, twenty-one".