1012121021211 has 16 divisors (see below), whose sum is σ = 1378306022400. Its totient is φ = 660343739648.

The previous prime is 1012121021159. The next prime is 1012121021257. The reversal of 1012121021211 is 1121201212101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1012121021211 - 2²¹ = 1012118924059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012121021291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1776250 + ... + 2275808.

It is an arithmetic number, because the mean of its divisors is an integer number (86144126400).

Almost surely, 2^{1012121021211} is an apocalyptic number.

1012121021211 is a deficient number, since it is larger than the sum of its proper divisors (366185001189).

1012121021211 is a wasteful number, since it uses less digits than its factorization.

1012121021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513978.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1012121021211 its reverse (1121201212101), we get a palindrome (2133322233312).

The spelling of 1012121021211 in words is "one trillion, twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred eleven".