102012021101 has 4 divisors (see below), whose sum is σ = 102016770492. Its totient is φ = 102007271712.

The previous prime is 102012021073. The next prime is 102012021103. The reversal of 102012021101 is 101120210201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31293256201 + 70718764900 = 176899^2 + 265930^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012021101 - 2⁶ = 102012021037 is a prime.

It is a super-2 number, since 2×102012021101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012021103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342330 + ... + 2385483.

It is an arithmetic number, because the mean of its divisors is an integer number (25504192623).

Almost surely, 2^102012021101 is an apocalyptic number.

It is an amenable number.

102012021101 is a deficient number, since it is larger than the sum of its proper divisors (4749391).

102012021101 is an equidigital number, since it uses as much as digits as its factorization.

102012021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749390.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102012021101 its reverse (101120210201), we get a palindrome (203132231302).

It can be divided in two parts, 10201 and 2021101, that added together give a palindrome (2031302).

The spelling of 102012021101 in words is "one hundred two billion, twelve million, twenty-one thousand, one hundred one".