121001221121011 has 48 divisors (see below), whose sum is σ = 153891290327040. Its totient is φ = 94078908000000.

The previous prime is 121001221120961. The next prime is 121001221121063. The reversal of 121001221121011 is 110121122100121.

It is not a de Polignac number, because 121001221121011 - 2¹⁹ = 121001220596723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121001221161011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448016011 + ... + 448286011.

It is an arithmetic number, because the mean of its divisors is an integer number (3206068548480).

Almost surely, 2^{121001221121011} is an apocalyptic number.

121001221121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121001221121011 is a deficient number, since it is larger than the sum of its proper divisors (32890069206029).

121001221121011 is a wasteful number, since it uses less digits than its factorization.

121001221121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271856 (or 271849 counting only the distinct ones).

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

Adding to 121001221121011 its reverse (110121122100121), we get a palindrome (231122343221132).

The spelling of 121001221121011 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-one million, one hundred twenty-one thousand, eleven".