1021212010105 has 16 divisors (see below), whose sum is σ = 1448813099520. Its totient is φ = 676112778432.

The previous prime is 1021212010103. The next prime is 1021212010171. The reversal of 1021212010105 is 5010102121201.

It is not a de Polignac number, because 1021212010105 - 2¹ = 1021212010103 is a prime.

It is a super-2 number, since 2×1021212010105² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021212010103) 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, 503059089 + ... + 503061118.

It is an arithmetic number, because the mean of its divisors is an integer number (90550818720).

Almost surely, 2^{1021212010105} is an apocalyptic number.

It is an amenable number.

1021212010105 is a deficient number, since it is larger than the sum of its proper divisors (427601089415).

1021212010105 is a wasteful number, since it uses less digits than its factorization.

1021212010105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006120248.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 1021212010105 its reverse (5010102121201), we get a palindrome (6031314131306).

The spelling of 1021212010105 in words is "one trillion, twenty-one billion, two hundred twelve million, ten thousand, one hundred five".