2111223431501 has 2 divisors, whose sum is σ = 2111223431502. Its totient is φ = 2111223431500.

The previous prime is 2111223431483. The next prime is 2111223431503. The reversal of 2111223431501 is 1051343221112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2025424234276 + 85799197225 = 1423174^2 + 292915^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111223431501 - 2¹⁴ = 2111223415117 is a prime.

It is a super-2 number, since 2×2111223431501² (a number of 25 digits) contains 22 as substring.

Together with 2111223431503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111223431503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055611715750 + 1055611715751.

It is an arithmetic number, because the mean of its divisors is an integer number (1055611715751).

Almost surely, 2^{2111223431501} is an apocalyptic number.

It is an amenable number.

2111223431501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111223431501 is an equidigital number, since it uses as much as digits as its factorization.

2111223431501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 2111223431501 its reverse (1051343221112), we get a palindrome (3162566652613).

The spelling of 2111223431501 in words is "two trillion, one hundred eleven billion, two hundred twenty-three million, four hundred thirty-one thousand, five hundred one".