40201212121 has 8 divisors (see below), whose sum is σ = 45945460800. Its totient is φ = 34457268048.

The previous prime is 40201212119. The next prime is 40201212127. The reversal of 40201212121 is 12121210204.

40201212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40201212121 - 2¹ = 40201212119 is a prime.

It is a super-2 number, since 2×40201212121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

40201212121 is a modest number, since divided by 212121 gives 40201 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 40201212095 and 40201212104.

It is not an unprimeable number, because it can be changed into a prime (40201212127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439095 + ... + 522691.

It is an arithmetic number, because the mean of its divisors is an integer number (5743182600).

Almost surely, 2^40201212121 is an apocalyptic number.

It is an amenable number.

40201212121 is a deficient number, since it is larger than the sum of its proper divisors (5744248679).

40201212121 is an equidigital number, since it uses as much as digits as its factorization.

40201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152303.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 40201212121 its reverse (12121210204), we get a palindrome (52322422325).

The spelling of 40201212121 in words is "forty billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".