102001021101 has 24 divisors (see below), whose sum is σ = 169497770624. Its totient is φ = 57900290400.

The previous prime is 102001021099. The next prime is 102001021123. The reversal of 102001021101 is 101120100201.

It is a happy number.

It is not a de Polignac number, because 102001021101 - 2¹ = 102001021099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001021141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5351626 + ... + 5370651.

Almost surely, 2^102001021101 is an apocalyptic number.

It is an amenable number.

102001021101 is a deficient number, since it is larger than the sum of its proper divisors (67496749523).

102001021101 is a wasteful number, since it uses less digits than its factorization.

102001021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722441 (or 10722438 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 102001021101 its reverse (101120100201), we get a palindrome (203121121302).

It can be divided in two parts, 10200 and 1021101, that added together give a palindrome (1031301).

The spelling of 102001021101 in words is "one hundred two billion, one million, twenty-one thousand, one hundred one".