121001011 has 4 divisors (see below), whose sum is σ = 123815032. Its totient is φ = 118186992.

The previous prime is 121000993. The next prime is 121001033. The reversal of 121001011 is 110100121.

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 121001011 - 2¹³ = 120992819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000985 and 121001003.

It is not an unprimeable number, because it can be changed into a prime (121001411) 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, 1406946 + ... + 1407031.

It is an arithmetic number, because the mean of its divisors is an integer number (30953758).

Almost surely, 2^121001011 is an apocalyptic number.

121001011 is a deficient number, since it is larger than the sum of its proper divisors (2814021).

121001011 is an equidigital number, since it uses as much as digits as its factorization.

121001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814020.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 121001011 is about 11000.0459544495. The cubic root of 121001011 is about 494.6101218677.

Adding to 121001011 its reverse (110100121), we get a palindrome (231101132).

The spelling of 121001011 in words is "one hundred twenty-one million, one thousand, eleven".