121010211011 has 4 divisors (see below), whose sum is σ = 122993985024. Its totient is φ = 119026437000.

The previous prime is 121010210963. The next prime is 121010211031. The reversal of 121010211011 is 110112010121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110112010121 = 983 ⋅112016287.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010211011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010210983 and 121010211001.

It is not an unprimeable number, because it can be changed into a prime (121010211031) 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, 991886915 + ... + 991887036.

It is an arithmetic number, because the mean of its divisors is an integer number (30748496256).

Almost surely, 2^121010211011 is an apocalyptic number.

121010211011 is a deficient number, since it is larger than the sum of its proper divisors (1983774013).

121010211011 is an equidigital number, since it uses as much as digits as its factorization.

121010211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983774012.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121010211011 its reverse (110112010121), we get a palindrome (231122221132).

The spelling of 121010211011 in words is "one hundred twenty-one billion, ten million, two hundred eleven thousand, eleven".