31220321123011 has 2 divisors, whose sum is σ = 31220321123012. Its totient is φ = 31220321123010.

The previous prime is 31220321122973. The next prime is 31220321123029. The reversal of 31220321123011 is 11032112302213.

It is a strong prime.

It is an emirp because it is prime and its reverse (11032112302213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31220321123011 - 2¹⁷ = 31220320991939 is a prime.

It is a super-2 number, since 2×31220321123011² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31220321123071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610160561505 + 15610160561506.

It is an arithmetic number, because the mean of its divisors is an integer number (15610160561506).

Almost surely, 2^{31220321123011} is an apocalyptic number.

31220321123011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220321123011 is an equidigital number, since it uses as much as digits as its factorization.

31220321123011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31220321123011 its reverse (11032112302213), we get a palindrome (42252433425224).

The spelling of 31220321123011 in words is "thirty-one trillion, two hundred twenty billion, three hundred twenty-one million, one hundred twenty-three thousand, eleven".