40221403032121 has 16 divisors (see below), whose sum is σ = 42636690000000. Its totient is φ = 37836123826176.

The previous prime is 40221403032061. The next prime is 40221403032127. The reversal of 40221403032121 is 12123030412204.

It is a cyclic number.

It is not a de Polignac number, because 40221403032121 - 2¹⁵ = 40221402999353 is a prime.

It is a super-2 number, since 2×40221403032121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40221403032127) 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, 6121465 + ... + 10858873.

It is an arithmetic number, because the mean of its divisors is an integer number (2664793125000).

Almost surely, 2^{40221403032121} is an apocalyptic number.

It is an amenable number.

40221403032121 is a deficient number, since it is larger than the sum of its proper divisors (2415286967879).

40221403032121 is a wasteful number, since it uses less digits than its factorization.

40221403032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740576.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 40221403032121 its reverse (12123030412204), we get a palindrome (52344433444325).

The spelling of 40221403032121 in words is "forty trillion, two hundred twenty-one billion, four hundred three million, thirty-two thousand, one hundred twenty-one".