121200670551 has 8 divisors (see below), whose sum is σ = 161640219904. Its totient is φ = 80780784120.

The previous prime is 121200670541. The next prime is 121200670561. The reversal of 121200670551 is 155076002121.

It is an interprime number because it is at equal distance from previous prime (121200670541) and next prime (121200670561).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121200670551 - 2²⁷ = 121066452823 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 (121200670511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4901341 + ... + 4926006.

It is an arithmetic number, because the mean of its divisors is an integer number (20205027488).

Almost surely, 2^121200670551 is an apocalyptic number.

121200670551 is a deficient number, since it is larger than the sum of its proper divisors (40439549353).

121200670551 is an equidigital number, since it uses as much as digits as its factorization.

121200670551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9831461.

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 121200670551 its reverse (155076002121), we get a palindrome (276276672672).

The spelling of 121200670551 in words is "one hundred twenty-one billion, two hundred million, six hundred seventy thousand, five hundred fifty-one".