13311221400121 has 32 divisors (see below), whose sum is σ = 14354482065408. Its totient is φ = 12313619398080.

The previous prime is 13311221400119. The next prime is 13311221400143. The reversal of 13311221400121 is 12100412211331.

It is a cyclic number.

It is not a de Polignac number, because 13311221400121 - 2¹ = 13311221400119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13311221400092 and 13311221400101.

It is not an unprimeable number, because it can be changed into a prime (13311221406121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478342410 + ... + 478370236.

It is an arithmetic number, because the mean of its divisors is an integer number (448577564544).

Almost surely, 2^{13311221400121} is an apocalyptic number.

It is an amenable number.

13311221400121 is a deficient number, since it is larger than the sum of its proper divisors (1043260665287).

13311221400121 is a wasteful number, since it uses less digits than its factorization.

13311221400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33501.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 13311221400121 its reverse (12100412211331), we get a palindrome (25411633611452).

The spelling of 13311221400121 in words is "thirteen trillion, three hundred eleven billion, two hundred twenty-one million, four hundred thousand, one hundred twenty-one".