40213220421 has 16 divisors (see below), whose sum is σ = 58545819648. Its totient is φ = 24349206000.

The previous prime is 40213220347. The next prime is 40213220431. The reversal of 40213220421 is 12402231204.

It is not a de Polignac number, because 40213220421 - 2¹³ = 40213212229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213220431) 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, 524655 + ... + 596396.

It is an arithmetic number, because the mean of its divisors is an integer number (3659113728).

Almost surely, 2^40213220421 is an apocalyptic number.

It is an amenable number.

40213220421 is a deficient number, since it is larger than the sum of its proper divisors (18332599227).

40213220421 is a wasteful number, since it uses less digits than its factorization.

40213220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122152.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 40213220421 its reverse (12402231204), we get a palindrome (52615451625).

The spelling of 40213220421 in words is "forty billion, two hundred thirteen million, two hundred twenty thousand, four hundred twenty-one".