1020212111121 has 12 divisors (see below), whose sum is σ = 1582369805232. Its totient is φ = 582978349128.

The previous prime is 1020212111077. The next prime is 1020212111173. The reversal of 1020212111121 is 1211112120201.

It is a happy number.

It is not a de Polignac number, because 1020212111121 - 2¹⁸ = 1020211848977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020212111121.

It is not an unprimeable number, because it can be changed into a prime (1020212111621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3470109075 + ... + 3470109368.

It is an arithmetic number, because the mean of its divisors is an integer number (131864150436).

Almost surely, 2^{1020212111121} is an apocalyptic number.

It is an amenable number.

1020212111121 is a deficient number, since it is larger than the sum of its proper divisors (562157694111).

1020212111121 is an equidigital number, since it uses as much as digits as its factorization.

1020212111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940218460 (or 6940218453 counting only the distinct ones).

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

Adding to 1020212111121 its reverse (1211112120201), we get a palindrome (2231324231322).

The spelling of 1020212111121 in words is "one trillion, twenty billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-one".