121102101 has 32 divisors (see below), whose sum is σ = 190713600. Its totient is φ = 75686400.

The previous prime is 121102049. The next prime is 121102129. The reversal of 121102101 is 101201121.

It is a happy number.

It is not a de Polignac number, because 121102101 - 2¹⁹ = 120577813 is a prime.

It is a super-2 number, since 2×121102101² = 29331437733228402, which contains 22 as substring.

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 (121102171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201201 + ... + 201801.

It is an arithmetic number, because the mean of its divisors is an integer number (5959800).

Almost surely, 2^121102101 is an apocalyptic number.

It is an amenable number.

121102101 is a deficient number, since it is larger than the sum of its proper divisors (69611499).

121102101 is a wasteful number, since it uses less digits than its factorization.

121102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1060 counting only the distinct ones).

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

The square root of 121102101 is about 11004.6399759374. The cubic root of 121102101 is about 494.7478238012.

Adding to 121102101 its reverse (101201121), we get a palindrome (222303222).

The spelling of 121102101 in words is "one hundred twenty-one million, one hundred two thousand, one hundred one".