40029142221 has 80 divisors (see below), whose sum is σ = 65252880000. Its totient is φ = 24357884544.

The previous prime is 40029142213. The next prime is 40029142253. The reversal of 40029142221 is 12224192004.

40029142221 is a `hidden beast` number, since 400 + 29 + 14 + 2 + 221 = 666.

It is not a de Polignac number, because 40029142221 - 2³ = 40029142213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40029142421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 37444875 + ... + 37445943.

It is an arithmetic number, because the mean of its divisors is an integer number (815661000).

Almost surely, 2^40029142221 is an apocalyptic number.

It is an amenable number.

40029142221 is a deficient number, since it is larger than the sum of its proper divisors (25223737779).

40029142221 is a wasteful number, since it uses less digits than its factorization.

40029142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 40029142221 in words is "forty billion, twenty-nine million, one hundred forty-two thousand, two hundred twenty-one".