4020221202031 has 4 divisors (see below), whose sum is σ = 4096074432312. Its totient is φ = 3944367971752.

The previous prime is 4020221202029. The next prime is 4020221202047. The reversal of 4020221202031 is 1302021220204.

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 4020221202031 - 2¹ = 4020221202029 is a prime.

It is a super-2 number, since 2×4020221202031² (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 (4020221202631) 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, 37926615061 + ... + 37926615166.

It is an arithmetic number, because the mean of its divisors is an integer number (1024018608078).

Almost surely, 2^{4020221202031} is an apocalyptic number.

4020221202031 is a deficient number, since it is larger than the sum of its proper divisors (75853230281).

4020221202031 is an equidigital number, since it uses as much as digits as its factorization.

4020221202031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75853230280.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 4020221202031 its reverse (1302021220204), we get a palindrome (5322242422235).

The spelling of 4020221202031 in words is "four trillion, twenty billion, two hundred twenty-one million, two hundred two thousand, thirty-one".