40515012121 has 16 divisors (see below), whose sum is σ = 43055308800. Its totient is φ = 38017148688.

The previous prime is 40515012103. The next prime is 40515012127. The reversal of 40515012121 is 12121051504.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40515012121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40515012092 and 40515012101.

It is not an unprimeable number, because it can be changed into a prime (40515012127) 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, 875400 + ... + 920518.

It is an arithmetic number, because the mean of its divisors is an integer number (2690956800).

Almost surely, 2^40515012121 is an apocalyptic number.

It is an amenable number.

40515012121 is a deficient number, since it is larger than the sum of its proper divisors (2540296679).

40515012121 is a wasteful number, since it uses less digits than its factorization.

40515012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45588.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 40515012121 its reverse (12121051504), we get a palindrome (52636063625).

The spelling of 40515012121 in words is "forty billion, five hundred fifteen million, twelve thousand, one hundred twenty-one".