122121651 has 16 divisors (see below), whose sum is σ = 173528064. Its totient is φ = 76215744.

The previous prime is 122121631. The next prime is 122121661. The reversal of 122121651 is 156121221.

It is not a de Polignac number, because 122121651 - 2⁵ = 122121619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122121631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15586 + ... + 22071.

It is an arithmetic number, because the mean of its divisors is an integer number (10845504).

Almost surely, 2^122121651 is an apocalyptic number.

122121651 is a deficient number, since it is larger than the sum of its proper divisors (51406413).

122121651 is a wasteful number, since it uses less digits than its factorization.

122121651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37730.

The product of its digits is 240, while the sum is 21.

The square root of 122121651 is about 11050.8665271100. The cubic root of 122121651 is about 496.1323612132.

Adding to 122121651 its reverse (156121221), we get a palindrome (278242872).

The spelling of 122121651 in words is "one hundred twenty-two million, one hundred twenty-one thousand, six hundred fifty-one".