40021202221 has 24 divisors (see below), whose sum is σ = 54694319904. Its totient is φ = 28786474080.

The previous prime is 40021202173. The next prime is 40021202269. The reversal of 40021202221 is 12220212004.

It is an interprime number because it is at equal distance from previous prime (40021202173) and next prime (40021202269).

It is not a de Polignac number, because 40021202221 - 2¹⁷ = 40021071149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40021202195 and 40021202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021202621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2848795 + ... + 2862808.

It is an arithmetic number, because the mean of its divisors is an integer number (2278929996).

Almost surely, 2^40021202221 is an apocalyptic number.

It is an amenable number.

40021202221 is a deficient number, since it is larger than the sum of its proper divisors (14673117683).

40021202221 is a wasteful number, since it uses less digits than its factorization.

40021202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711641 (or 5711634 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 40021202221 its reverse (12220212004), we get a palindrome (52241414225).

It can be divided in two parts, 40021 and 202221, that added together give a palindrome (242242).

The spelling of 40021202221 in words is "forty billion, twenty-one million, two hundred two thousand, two hundred twenty-one".