102120021101011 has 4 divisors (see below), whose sum is σ = 102121392853000. Its totient is φ = 102118649349024.

The previous prime is 102120021100997. The next prime is 102120021101089. The reversal of 102120021101011 is 110101120021201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102120021101011 - 2¹³ = 102120021092819 is a prime.

It is a super-3 number, since 3×102120021101011³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120021100982 and 102120021101000.

It is not an unprimeable number, because it can be changed into a prime (102120021101911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685764321 + ... + 685913218.

It is an arithmetic number, because the mean of its divisors is an integer number (25530348213250).

Almost surely, 2^{102120021101011} is an apocalyptic number.

102120021101011 is a deficient number, since it is larger than the sum of its proper divisors (1371751989).

102120021101011 is an equidigital number, since it uses as much as digits as its factorization.

102120021101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371751988.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102120021101011 its reverse (110101120021201), we get a palindrome (212221141122212).

The spelling of 102120021101011 in words is "one hundred two trillion, one hundred twenty billion, twenty-one million, one hundred one thousand, eleven".