121421583937 has 8 divisors (see below), whose sum is σ = 123312447080. Its totient is φ = 119536871040.

The previous prime is 121421583931. The next prime is 121421583967. The reversal of 121421583937 is 739385124121.

It is a Cunningham number, because it is equal to 348456²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 48239972496 + 73181611441 = 219636^2 + 270521^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121421583937 - 2²³ = 121413195329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121421583931) 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, 1497762 + ... + 1576747.

It is an arithmetic number, because the mean of its divisors is an integer number (15414055885).

Almost surely, 2^121421583937 is an apocalyptic number.

It is an amenable number.

121421583937 is a deficient number, since it is larger than the sum of its proper divisors (1890863143).

121421583937 is an equidigital number, since it uses as much as digits as its factorization.

121421583937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075123.

The product of its digits is 362880, while the sum is 46.

The spelling of 121421583937 in words is "one hundred twenty-one billion, four hundred twenty-one million, five hundred eighty-three thousand, nine hundred thirty-seven".