121401030551 has 4 divisors (see below), whose sum is σ = 122274419400. Its totient is φ = 120527641704.

The previous prime is 121401030529. The next prime is 121401030559. The reversal of 121401030551 is 155030104121.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-121401030551 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 (121401030559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436694216 + ... + 436694493.

It is an arithmetic number, because the mean of its divisors is an integer number (30568604850).

Almost surely, 2^121401030551 is an apocalyptic number.

121401030551 is a deficient number, since it is larger than the sum of its proper divisors (873388849).

121401030551 is an equidigital number, since it uses as much as digits as its factorization.

121401030551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873388848.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 121401030551 its reverse (155030104121), we get a palindrome (276431134672).

The spelling of 121401030551 in words is "one hundred twenty-one billion, four hundred one million, thirty thousand, five hundred fifty-one".