121011101211 has 96 divisors (see below), whose sum is σ = 223715409408. Its totient is φ = 56458321920.

The previous prime is 121011101177. The next prime is 121011101273. The reversal of 121011101211 is 112101110121.

It is not a de Polignac number, because 121011101211 - 2⁶ = 121011101147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121011101311) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1402555 + ... + 1486331.

It is an arithmetic number, because the mean of its divisors is an integer number (2330368848).

Almost surely, 2^121011101211 is an apocalyptic number.

121011101211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121011101211 is a deficient number, since it is larger than the sum of its proper divisors (102704308197).

121011101211 is a wasteful number, since it uses less digits than its factorization.

121011101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83861 (or 83848 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121011101211 its reverse (112101110121), we get a palindrome (233112211332).

It can be divided in two parts, 121011 and 101211, that added together give a palindrome (222222).

The spelling of 121011101211 in words is "one hundred twenty-one billion, eleven million, one hundred one thousand, two hundred eleven".