121400807 has 4 divisors (see below), whose sum is σ = 132437256. Its totient is φ = 110364360.

The previous prime is 121400803. The next prime is 121400869. The reversal of 121400807 is 708004121.

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 121400807 - 2² = 121400803 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 (121400803) 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, 5518208 + ... + 5518229.

It is an arithmetic number, because the mean of its divisors is an integer number (33109314).

Almost surely, 2^121400807 is an apocalyptic number.

121400807 is a deficient number, since it is larger than the sum of its proper divisors (11036449).

121400807 is a wasteful number, since it uses less digits than its factorization.

121400807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11036448.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 121400807 is about 11018.2034379476. The cubic root of 121400807 is about 495.1542654240.

Adding to 121400807 its reverse (708004121), we get a palindrome (829404928).

The spelling of 121400807 in words is "one hundred twenty-one million, four hundred thousand, eight hundred seven".