1011210121111 has 4 divisors (see below), whose sum is σ = 1012079606472. Its totient is φ = 1010340635752.

The previous prime is 1011210121081. The next prime is 1011210121133. The reversal of 1011210121111 is 1111210121101.

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 1011210121111 - 2⁷ = 1011210120983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011210121091 and 1011210121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011210121811) 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, 434740936 + ... + 434743261.

It is an arithmetic number, because the mean of its divisors is an integer number (253019901618).

Almost surely, 2^{1011210121111} is an apocalyptic number.

1011210121111 is a deficient number, since it is larger than the sum of its proper divisors (869485361).

1011210121111 is an equidigital number, since it uses as much as digits as its factorization.

1011210121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869485360.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1011210121111 its reverse (1111210121101), we get a palindrome (2122420242212).

The spelling of 1011210121111 in words is "one trillion, eleven billion, two hundred ten million, one hundred twenty-one thousand, one hundred eleven".