2012101021 has 16 divisors (see below), whose sum is σ = 2386188288. Its totient is φ = 1660806000.

The previous prime is 2012101009. The next prime is 2012101031. The reversal of 2012101021 is 1201012102.

2012101021 = 334² + 335² + ... + 1824².

It is not a de Polignac number, because 2012101021 - 2⁵ = 2012100989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012100989 and 2012101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012101001) 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, 25705 + ... + 68446.

It is an arithmetic number, because the mean of its divisors is an integer number (149136768).

Almost surely, 2^2012101021 is an apocalyptic number.

It is an amenable number.

2012101021 is a deficient number, since it is larger than the sum of its proper divisors (374087267).

2012101021 is an equidigital number, since it uses as much as digits as its factorization.

2012101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94272.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2012101021 is about 44856.4490458173. The cubic root of 2012101021 is about 1262.4569973393.

Adding to 2012101021 its reverse (1201012102), we get a palindrome (3213113123).

The spelling of 2012101021 in words is "two billion, twelve million, one hundred one thousand, twenty-one".