102120311 has 2 divisors, whose sum is σ = 102120312. Its totient is φ = 102120310.

The previous prime is 102120301. The next prime is 102120323. The reversal of 102120311 is 113021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102120311 - 2¹⁸ = 101858167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102120292 and 102120301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102120301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060155 + 51060156.

It is an arithmetic number, because the mean of its divisors is an integer number (51060156).

Almost surely, 2^102120311 is an apocalyptic number.

102120311 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120311 is an equidigital number, since it uses as much as digits as its factorization.

102120311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 102120311 is about 10105.4594650614. The cubic root of 102120311 is about 467.4165041005.

Adding to 102120311 its reverse (113021201), we get a palindrome (215141512).

The spelling of 102120311 in words is "one hundred two million, one hundred twenty thousand, three hundred eleven".