121651201 has 16 divisors (see below), whose sum is σ = 152288640. Its totient is φ = 94752000.

The previous prime is 121651193. The next prime is 121651217. The reversal of 121651201 is 102156121.

It is not a de Polignac number, because 121651201 - 2³ = 121651193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121651261) 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, 14175 + ... + 21076.

It is an arithmetic number, because the mean of its divisors is an integer number (9518040).

It is a Proth number, since it is equal to 7425 ⋅ 2¹⁴ + 1 and 7425 < 2¹⁴.

Almost surely, 2^121651201 is an apocalyptic number.

It is an amenable number.

121651201 is a deficient number, since it is larger than the sum of its proper divisors (30637439).

121651201 is a wasteful number, since it uses less digits than its factorization.

121651201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35304.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 121651201 is about 11029.5603266857. The cubic root of 121651201 is about 495.4944567767.

It can be divided in two parts, 12165 and 1201, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 121651201 in words is "one hundred twenty-one million, six hundred fifty-one thousand, two hundred one".