40012100121 has 32 divisors (see below), whose sum is σ = 65173506048. Its totient is φ = 21336543360.

The previous prime is 40012100119. The next prime is 40012100131. The reversal of 40012100121 is 12100121004.

It is a happy number.

It is not a de Polignac number, because 40012100121 - 2¹ = 40012100119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40012100097 and 40012100106.

It is not an unprimeable number, because it can be changed into a prime (40012100131) 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, 990451 + ... + 1030056.

It is an arithmetic number, because the mean of its divisors is an integer number (2036672064).

Almost surely, 2^40012100121 is an apocalyptic number.

40012100121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40012100121 is a deficient number, since it is larger than the sum of its proper divisors (25161405927).

40012100121 is a wasteful number, since it uses less digits than its factorization.

40012100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020581.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 40012100121 its reverse (12100121004), we get a palindrome (52112221125).

The spelling of 40012100121 in words is "forty billion, twelve million, one hundred thousand, one hundred twenty-one".