121860029 has 6 divisors (see below), whose sum is σ = 129450234. Its totient is φ = 114691520.

The previous prime is 121860023. The next prime is 121860031. The reversal of 121860029 is 920068121.

It can be written as a sum of positive squares in 3 ways, for example, as 40896025 + 80964004 = 6395^2 + 8998^2 .

It is not a de Polignac number, because 121860029 - 2¹² = 121855933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121859983 and 121860010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121860023) 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, 210542 + ... + 211119.

It is an arithmetic number, because the mean of its divisors is an integer number (21575039).

Almost surely, 2^121860029 is an apocalyptic number.

It is an amenable number.

121860029 is a deficient number, since it is larger than the sum of its proper divisors (7590205).

121860029 is an equidigital number, since it uses as much as digits as its factorization.

121860029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421695 (or 421678 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 121860029 is about 11039.0230093066. The cubic root of 121860029 is about 495.7778187280. Note that the first 3 decimals are identical.

The spelling of 121860029 in words is "one hundred twenty-one million, eight hundred sixty thousand, twenty-nine".