40121532054121 has 16 divisors (see below), whose sum is σ = 47510170012800. Its totient is φ = 33169137176448.

The previous prime is 40121532054113. The next prime is 40121532054133. The reversal of 40121532054121 is 12145023512104.

It is not a de Polignac number, because 40121532054121 - 2³ = 40121532054113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121532054421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916455156 + ... + 916498933.

It is an arithmetic number, because the mean of its divisors is an integer number (2969385625800).

Almost surely, 2^{40121532054121} is an apocalyptic number.

It is an amenable number.

40121532054121 is a deficient number, since it is larger than the sum of its proper divisors (7388637958679).

40121532054121 is a wasteful number, since it uses less digits than its factorization.

40121532054121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832954208.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 40121532054121 its reverse (12145023512104), we get a palindrome (52266555566225).

The spelling of 40121532054121 in words is "forty trillion, one hundred twenty-one billion, five hundred thirty-two million, fifty-four thousand, one hundred twenty-one".