121202101 has 2 divisors, whose sum is σ = 121202102. Its totient is φ = 121202100.

The previous prime is 121202099. The next prime is 121202131. The reversal of 121202101 is 101202121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112381201 + 8820900 = 10601^2 + 2970^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202101 - 2¹ = 121202099 is a prime.

Together with 121202099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121202131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601050 + 60601051.

It is an arithmetic number, because the mean of its divisors is an integer number (60601051).

Almost surely, 2^121202101 is an apocalyptic number.

It is an amenable number.

121202101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202101 is an equidigital number, since it uses as much as digits as its factorization.

121202101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121202101 is about 11009.1825763769. The cubic root of 121202101 is about 494.8839655920.

Adding to 121202101 its reverse (101202121), we get a palindrome (222404222).

The spelling of 121202101 in words is "one hundred twenty-one million, two hundred two thousand, one hundred one".