40125121011 has 16 divisors (see below), whose sum is σ = 59561431200. Its totient is φ = 26697517344.

The previous prime is 40125120991. The next prime is 40125121037. The reversal of 40125121011 is 11012152104.

40125121011 is a `hidden beast` number, since 40 + 12 + 512 + 101 + 1 = 666.

It is not a de Polignac number, because 40125121011 - 2¹⁵ = 40125088243 is a prime.

It is a super-2 number, since 2×40125121011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40125121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446096 + ... + 1473581.

It is an arithmetic number, because the mean of its divisors is an integer number (3722589450).

Almost surely, 2^40125121011 is an apocalyptic number.

40125121011 is a deficient number, since it is larger than the sum of its proper divisors (19436310189).

40125121011 is a wasteful number, since it uses less digits than its factorization.

40125121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920195 (or 2920189 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 40125121011 its reverse (11012152104), we get a palindrome (51137273115).

The spelling of 40125121011 in words is "forty billion, one hundred twenty-five million, one hundred twenty-one thousand, eleven".