40022121 has 12 divisors (see below), whose sum is σ = 54702032. Its totient is φ = 26014128.

The previous prime is 40022107. The next prime is 40022137. The reversal of 40022121 is 12122004.

It is not a de Polignac number, because 40022121 - 2²³ = 31633513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40022097 and 40022106.

It is not an unprimeable number, because it can be changed into a prime (40022621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71575 + ... + 72131.

Almost surely, 2^40022121 is an apocalyptic number.

It is an amenable number.

40022121 is a deficient number, since it is larger than the sum of its proper divisors (14679911).

40022121 is an frugal number, since it uses more digits than its factorization.

40022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 40022121 is about 6326.3038972215. The cubic root of 40022121 is about 342.0582216805.

Adding to 40022121 its reverse (12122004), we get a palindrome (52144125).

The spelling of 40022121 in words is "forty million, twenty-two thousand, one hundred twenty-one".