121055619 has 4 divisors (see below), whose sum is σ = 161407496. Its totient is φ = 80703744.

The previous prime is 121055617. The next prime is 121055653. The reversal of 121055619 is 916550121.

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

It is not a de Polignac number, because 121055619 - 2¹ = 121055617 is a prime.

It is a super-2 number, since 2×121055619² = 29308925782946322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121055611) 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, 20175934 + ... + 20175939.

It is an arithmetic number, because the mean of its divisors is an integer number (40351874).

Almost surely, 2^121055619 is an apocalyptic number.

121055619 is a deficient number, since it is larger than the sum of its proper divisors (40351877).

121055619 is an equidigital number, since it uses as much as digits as its factorization.

121055619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40351876.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 121055619 is about 11002.5278459089. The cubic root of 121055619 is about 494.6845168587.

The spelling of 121055619 in words is "one hundred twenty-one million, fifty-five thousand, six hundred nineteen".