221422122401731 has 4 divisors (see below), whose sum is σ = 221426102650464. Its totient is φ = 221418142153000.

The previous prime is 221422122401659. The next prime is 221422122401803. The reversal of 221422122401731 is 137104221224122.

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

It is an interprime number because it is at equal distance from previous prime (221422122401659) and next prime (221422122401803).

It is a cyclic number.

It is not a de Polignac number, because 221422122401731 - 2³⁹ = 220872366587843 is a prime.

It is a super-2 number, since 2×221422122401731² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221422122402731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990040920 + ... + 1990152181.

It is an arithmetic number, because the mean of its divisors is an integer number (55356525662616).

Almost surely, 2^{221422122401731} is an apocalyptic number.

221422122401731 is a deficient number, since it is larger than the sum of its proper divisors (3980248733).

221422122401731 is an equidigital number, since it uses as much as digits as its factorization.

221422122401731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980248732.

The product of its (nonzero) digits is 21504, while the sum is 34.

Adding to 221422122401731 its reverse (137104221224122), we get a palindrome (358526343625853).

The spelling of 221422122401731 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, one hundred twenty-two million, four hundred one thousand, seven hundred thirty-one".