400121121413 has 8 divisors (see below), whose sum is σ = 439029852408. Its totient is φ = 362373845184.

The previous prime is 400121121377. The next prime is 400121121427. The reversal of 400121121413 is 314121121004.

It can be written as a sum of positive squares in 4 ways, for example, as 3464264164 + 396656857249 = 58858^2 + 629807^2 .

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

It is not a de Polignac number, because 400121121413 - 2⁶ = 400121121349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400121121443) 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, 290362970 + ... + 290364347.

It is an arithmetic number, because the mean of its divisors is an integer number (54878731551).

Almost surely, 2^400121121413 is an apocalyptic number.

It is an amenable number.

400121121413 is a deficient number, since it is larger than the sum of its proper divisors (38908730995).

400121121413 is a wasteful number, since it uses less digits than its factorization.

400121121413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580727383.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 400121121413 its reverse (314121121004), we get a palindrome (714242242417).

The spelling of 400121121413 in words is "four hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, four hundred thirteen".