121202149 has 4 divisors (see below), whose sum is σ = 123489036. Its totient is φ = 118915264.

The previous prime is 121202131. The next prime is 121202171. The reversal of 121202149 is 941202121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941202121 = 919 ⋅1024159.

It can be written as a sum of positive squares in 2 ways, for example, as 106708900 + 14493249 = 10330^2 + 3807^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202149 - 2¹³ = 121193957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202189) 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, 1143364 + ... + 1143469.

It is an arithmetic number, because the mean of its divisors is an integer number (30872259).

Almost surely, 2^121202149 is an apocalyptic number.

It is an amenable number.

121202149 is a deficient number, since it is larger than the sum of its proper divisors (2286887).

121202149 is an equidigital number, since it uses as much as digits as its factorization.

121202149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286886.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 121202149 is about 11009.1847563750. The cubic root of 121202149 is about 494.8840309221.

The spelling of 121202149 in words is "one hundred twenty-one million, two hundred two thousand, one hundred forty-nine".