40221222121 has 4 divisors (see below), whose sum is σ = 40221756544. Its totient is φ = 40220687700.

The previous prime is 40221222079. The next prime is 40221222127. The reversal of 40221222121 is 12122212204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40221222121 - 2¹⁷ = 40221091049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40221222127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131265 + ... + 312526.

It is an arithmetic number, because the mean of its divisors is an integer number (10055439136).

Almost surely, 2^40221222121 is an apocalyptic number.

It is an amenable number.

40221222121 is a deficient number, since it is larger than the sum of its proper divisors (534423).

40221222121 is an equidigital number, since it uses as much as digits as its factorization.

40221222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534422.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 40221222121 its reverse (12122212204), we get a palindrome (52343434325).

The spelling of 40221222121 in words is "forty billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".