121434551 has 16 divisors (see below), whose sum is σ = 141625344. Its totient is φ = 101974464.

The previous prime is 121434541. The next prime is 121434559. The reversal of 121434551 is 155434121.

It is a cyclic number.

It is not a de Polignac number, because 121434551 - 2²² = 117240247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121434551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121434559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84626 + ... + 86048.

It is an arithmetic number, because the mean of its divisors is an integer number (8851584).

Almost surely, 2^121434551 is an apocalyptic number.

121434551 is a deficient number, since it is larger than the sum of its proper divisors (20190793).

121434551 is a wasteful number, since it uses less digits than its factorization.

121434551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670.

The product of its digits is 2400, while the sum is 26.

The square root of 121434551 is about 11019.7346156793. The cubic root of 121434551 is about 495.2001380947.

Adding to 121434551 its reverse (155434121), we get a palindrome (276868672).

It can be divided in two parts, 1214 and 34551, that multiplied together give a palindrome (41944914).

The spelling of 121434551 in words is "one hundred twenty-one million, four hundred thirty-four thousand, five hundred fifty-one".