121001231011 has 4 divisors (see below), whose sum is σ = 121002379624. Its totient is φ = 121000082400.

The previous prime is 121001230993. The next prime is 121001231023. The reversal of 121001231011 is 110132100121.

It is a happy number.

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 121001231011 - 2¹³ = 121001222819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001230982 and 121001231000.

It is not an unprimeable number, because it can be changed into a prime (121001231111) 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, 398310 + ... + 632971.

It is an arithmetic number, because the mean of its divisors is an integer number (30250594906).

Almost surely, 2^121001231011 is an apocalyptic number.

121001231011 is a deficient number, since it is larger than the sum of its proper divisors (1148613).

121001231011 is a wasteful number, since it uses less digits than its factorization.

121001231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148612.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121001231011 its reverse (110132100121), we get a palindrome (231133331132).

The spelling of 121001231011 in words is "one hundred twenty-one billion, one million, two hundred thirty-one thousand, eleven".