121310829 has 6 divisors (see below), whose sum is σ = 175226766. Its totient is φ = 80873880.

The previous prime is 121310821. The next prime is 121310831. The reversal of 121310829 is 928013121.

It can be written as a sum of positive squares in only one way, i.e., 112148100 + 9162729 = 10590^2 + 3027^2 .

It is not a de Polignac number, because 121310829 - 2³ = 121310821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6739482 + ... + 6739499.

It is an arithmetic number, because the mean of its divisors is an integer number (29204461).

Almost surely, 2^121310829 is an apocalyptic number.

It is an amenable number.

121310829 is a deficient number, since it is larger than the sum of its proper divisors (53915937).

121310829 is a wasteful number, since it uses less digits than its factorization.

121310829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478987 (or 13478984 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 121310829 is about 11014.1195290409. The cubic root of 121310829 is about 495.0319048918.

The spelling of 121310829 in words is "one hundred twenty-one million, three hundred ten thousand, eight hundred twenty-nine".