1021011121211 has 4 divisors (see below), whose sum is σ = 1021013393400. Its totient is φ = 1021008849024.

The previous prime is 1021011121129. The next prime is 1021011121241. The reversal of 1021011121211 is 1121211101201.

1021011121211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021011121211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021011121241) 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, 210941 + ... + 1444478.

It is an arithmetic number, because the mean of its divisors is an integer number (255253348350).

Almost surely, 2^{1021011121211} is an apocalyptic number.

1021011121211 is a deficient number, since it is larger than the sum of its proper divisors (2272189).

1021011121211 is an equidigital number, since it uses as much as digits as its factorization.

1021011121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272188.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1021011121211 its reverse (1121211101201), we get a palindrome (2142222222412).

The spelling of 1021011121211 in words is "one trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred eleven".