121777007 has 4 divisors (see below), whose sum is σ = 132847656. Its totient is φ = 110706360.

The previous prime is 121776983. The next prime is 121777031. The reversal of 121777007 is 700777121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700777121 = 11 ⋅63707011.

It is an interprime number because it is at equal distance from previous prime (121776983) and next prime (121777031).

It is a cyclic number.

It is not a de Polignac number, because 121777007 - 2⁶ = 121776943 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 (121777037) 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, 5535308 + ... + 5535329.

It is an arithmetic number, because the mean of its divisors is an integer number (33211914).

Almost surely, 2^121777007 is an apocalyptic number.

121777007 is a deficient number, since it is larger than the sum of its proper divisors (11070649).

121777007 is a wasteful number, since it uses less digits than its factorization.

121777007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070648.

The product of its (nonzero) digits is 4802, while the sum is 32.

The square root of 121777007 is about 11035.2619814846. The cubic root of 121777007 is about 495.6652036856.

The spelling of 121777007 in words is "one hundred twenty-one million, seven hundred seventy-seven thousand, seven".