121202445 has 32 divisors (see below), whose sum is σ = 238678272. Its totient is φ = 51144192.

The previous prime is 121202443. The next prime is 121202447. The reversal of 121202445 is 544202121.

It is an interprime number because it is at equal distance from previous prime (121202443) and next prime (121202447).

It is not a de Polignac number, because 121202445 - 2¹ = 121202443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202443) 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, 43032 + ... + 45761.

It is an arithmetic number, because the mean of its divisors is an integer number (7458696).

Almost surely, 2^121202445 is an apocalyptic number.

121202445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121202445 is a deficient number, since it is larger than the sum of its proper divisors (117475827).

121202445 is a wasteful number, since it uses less digits than its factorization.

121202445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88821.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121202445 is about 11009.1981996874. The cubic root of 121202445 is about 494.8844337905.

Adding to 121202445 its reverse (544202121), we get a palindrome (665404566).

It can be divided in two parts, 121 and 202445, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 121202445 in words is "one hundred twenty-one million, two hundred two thousand, four hundred forty-five".