121210253 has 16 divisors (see below), whose sum is σ = 134860800. Its totient is φ = 108416880.

The previous prime is 121210237. The next prime is 121210333. The reversal of 121210253 is 352012121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121210253 - 2⁴ = 121210237 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 (121210213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32768 + ... + 36278.

It is an arithmetic number, because the mean of its divisors is an integer number (8428800).

Almost surely, 2^121210253 is an apocalyptic number.

It is an amenable number.

121210253 is a deficient number, since it is larger than the sum of its proper divisors (13650547).

121210253 is a wasteful number, since it uses less digits than its factorization.

121210253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121210253 is about 11009.5528065403. The cubic root of 121210253 is about 494.8950605692.

Adding to 121210253 its reverse (352012121), we get a palindrome (473222374).

The spelling of 121210253 in words is "one hundred twenty-one million, two hundred ten thousand, two hundred fifty-three".