121049551 has 12 divisors (see below), whose sum is σ = 148225080. Its totient is φ = 98295120.

The previous prime is 121049543. The next prime is 121049557. The reversal of 121049551 is 155940121.

It is not a de Polignac number, because 121049551 - 2³ = 121049543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121049557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64080 + ... + 65941.

It is an arithmetic number, because the mean of its divisors is an integer number (12352090).

Almost surely, 2^121049551 is an apocalyptic number.

121049551 is a deficient number, since it is larger than the sum of its proper divisors (27175529).

121049551 is a wasteful number, since it uses less digits than its factorization.

121049551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130054 (or 130047 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 121049551 is about 11002.2520876410. The cubic root of 121049551 is about 494.6762512482.

Adding to 121049551 its reverse (155940121), we get a palindrome (276989672).

The spelling of 121049551 in words is "one hundred twenty-one million, forty-nine thousand, five hundred fifty-one".