121011047 has 4 divisors (see below), whose sum is σ = 121781976. Its totient is φ = 120240120.

The previous prime is 121011043. The next prime is 121011071. The reversal of 121011047 is 740110121.

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 121011047 - 2² = 121011043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011043) 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, 385229 + ... + 385542.

It is an arithmetic number, because the mean of its divisors is an integer number (30445494).

Almost surely, 2^121011047 is an apocalyptic number.

121011047 is a deficient number, since it is larger than the sum of its proper divisors (770929).

121011047 is an equidigital number, since it uses as much as digits as its factorization.

121011047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770928.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 121011047 is about 11000.5021249032. The cubic root of 121011047 is about 494.6237960508.

Adding to 121011047 its reverse (740110121), we get a palindrome (861121168).

The spelling of 121011047 in words is "one hundred twenty-one million, eleven thousand, forty-seven".