4021221011431 has 4 divisors (see below), whose sum is σ = 4330545704632. Its totient is φ = 3711896318232.

The previous prime is 4021221011399. The next prime is 4021221011503. The reversal of 4021221011431 is 1341101221204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4021221011431 - 2⁵ = 4021221011399 is a prime.

It is a super-2 number, since 2×4021221011431² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021221011131) 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, 154662346581 + ... + 154662346606.

It is an arithmetic number, because the mean of its divisors is an integer number (1082636426158).

Almost surely, 2^{4021221011431} is an apocalyptic number.

4021221011431 is a deficient number, since it is larger than the sum of its proper divisors (309324693201).

4021221011431 is a wasteful number, since it uses less digits than its factorization.

4021221011431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309324693200.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 4021221011431 its reverse (1341101221204), we get a palindrome (5362322232635).

The spelling of 4021221011431 in words is "four trillion, twenty-one billion, two hundred twenty-one million, eleven thousand, four hundred thirty-one".