121651253 has 2 divisors, whose sum is σ = 121651254. Its totient is φ = 121651252.

The previous prime is 121651247. The next prime is 121651261. The reversal of 121651253 is 352156121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104816644 + 16834609 = 10238^2 + 4103^2 .

It is a cyclic number.

It is not a de Polignac number, because 121651253 - 2⁴ = 121651237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121651273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60825626 + 60825627.

It is an arithmetic number, because the mean of its divisors is an integer number (60825627).

Almost surely, 2^121651253 is an apocalyptic number.

It is an amenable number.

121651253 is a deficient number, since it is larger than the sum of its proper divisors (1).

121651253 is an equidigital number, since it uses as much as digits as its factorization.

121651253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 121651253 is about 11029.5626839871. The cubic root of 121651253 is about 495.4945273767.

It can be divided in two parts, 121651 and 253, that multiplied together give a palindrome (30777703).

The spelling of 121651253 in words is "one hundred twenty-one million, six hundred fifty-one thousand, two hundred fifty-three".