1020121211211 has 8 divisors (see below), whose sum is σ = 1360236139920. Its totient is φ = 680043544992.

The previous prime is 1020121211203. The next prime is 1020121211237. The reversal of 1020121211211 is 1121121210201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020121211211 - 2³ = 1020121211203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020121210211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9251680 + ... + 9361293.

It is an arithmetic number, because the mean of its divisors is an integer number (170029517490).

Almost surely, 2^{1020121211211} is an apocalyptic number.

1020121211211 is a deficient number, since it is larger than the sum of its proper divisors (340114928709).

1020121211211 is a wasteful number, since it uses less digits than its factorization.

1020121211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18631245.

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

Adding to 1020121211211 its reverse (1121121210201), we get a palindrome (2141242421412).

The spelling of 1020121211211 in words is "one trillion, twenty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eleven".