72120221212331 has 2 divisors, whose sum is σ = 72120221212332. Its totient is φ = 72120221212330.

The previous prime is 72120221212327. The next prime is 72120221212349. The reversal of 72120221212331 is 13321212202127.

It is a weak prime.

It is an emirp because it is prime and its reverse (13321212202127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72120221212331 - 2² = 72120221212327 is a prime.

It is a super-2 number, since 2×72120221212331² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72120221212294 and 72120221212303.

It is not a weakly prime, because it can be changed into another prime (72120221212301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36060110606165 + 36060110606166.

It is an arithmetic number, because the mean of its divisors is an integer number (36060110606166).

Almost surely, 2^{72120221212331} is an apocalyptic number.

72120221212331 is a deficient number, since it is larger than the sum of its proper divisors (1).

72120221212331 is an equidigital number, since it uses as much as digits as its factorization.

72120221212331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 72120221212331 its reverse (13321212202127), we get a palindrome (85441433414458).

The spelling of 72120221212331 in words is "seventy-two trillion, one hundred twenty billion, two hundred twenty-one million, two hundred twelve thousand, three hundred thirty-one".