1020121120211 has 4 divisors (see below), whose sum is σ = 1030221329424. Its totient is φ = 1010020911000.

The previous prime is 1020121120199. The next prime is 1020121120259. The reversal of 1020121120211 is 1120211210201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020121120211 - 2¹⁸ = 1020120858067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020121120511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5050104455 + ... + 5050104656.

It is an arithmetic number, because the mean of its divisors is an integer number (257555332356).

Almost surely, 2^{1020121120211} is an apocalyptic number.

1020121120211 is a deficient number, since it is larger than the sum of its proper divisors (10100209213).

1020121120211 is a wasteful number, since it uses less digits than its factorization.

1020121120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100209212.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1020121120211 its reverse (1120211210201), we get a palindrome (2140332330412).

The spelling of 1020121120211 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred eleven".