121571901441 has 6 divisors (see below), whose sum is σ = 175603857650. Its totient is φ = 81047934288.

The previous prime is 121571901431. The next prime is 121571901467. The reversal of 121571901441 is 144109175121.

121571901441 is a `hidden beast` number, since 1 + 21 + 5 + 7 + 190 + 1 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90144057600 + 31427843841 = 300240^2 + 177279^2 .

It is not a de Polignac number, because 121571901441 - 2¹³ = 121571893249 is a prime.

It is a super-3 number, since 3×121571901441³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121571901396 and 121571901405.

It is not an unprimeable number, because it can be changed into a prime (121571901401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6753994516 + ... + 6753994533.

It is a Proth number, since it is equal to 28985 ⋅ 2²² + 1 and 28985 < 2²².

Almost surely, 2^121571901441 is an apocalyptic number.

It is an amenable number.

121571901441 is a deficient number, since it is larger than the sum of its proper divisors (54031956209).

121571901441 is a wasteful number, since it uses less digits than its factorization.

121571901441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13507989055 (or 13507989052 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 121571901441 in words is "one hundred twenty-one billion, five hundred seventy-one million, nine hundred one thousand, four hundred forty-one".