1012021220105 has 64 divisors (see below), whose sum is σ = 1446078873600. Its totient is φ = 665657118720.

The previous prime is 1012021220087. The next prime is 1012021220131. The reversal of 1012021220105 is 5010221202101.

It is not a de Polignac number, because 1012021220105 - 2⁸ = 1012021219849 is a prime.

It is a super-2 number, since 2×1012021220105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13834616 + ... + 13907574.

It is an arithmetic number, because the mean of its divisors is an integer number (22594982400).

Almost surely, 2^{1012021220105} is an apocalyptic number.

It is an amenable number.

1012021220105 is a deficient number, since it is larger than the sum of its proper divisors (434057653495).

1012021220105 is an equidigital number, since it uses as much as digits as its factorization.

1012021220105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73194.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 1012021220105 its reverse (5010221202101), we get a palindrome (6022242422206).

The spelling of 1012021220105 in words is "one trillion, twelve billion, twenty-one million, two hundred twenty thousand, one hundred five".