121627764069 has 32 divisors (see below), whose sum is σ = 199942421760. Its totient is φ = 64179028992.

The previous prime is 121627764067. The next prime is 121627764101. The reversal of 121627764069 is 960467726121.

It is a happy number.

It is not a de Polignac number, because 121627764069 - 2¹ = 121627764067 is a prime.

It is a super-2 number, since 2×121627764069² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121627764067) 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 31 ways as a sum of consecutive naturals, for example, 3195174 + ... + 3233015.

It is an arithmetic number, because the mean of its divisors is an integer number (6248200680).

Almost surely, 2^121627764069 is an apocalyptic number.

It is an amenable number.

121627764069 is a deficient number, since it is larger than the sum of its proper divisors (78314657691).

121627764069 is a wasteful number, since it uses less digits than its factorization.

121627764069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6428269.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 121627764069 in words is "one hundred twenty-one billion, six hundred twenty-seven million, seven hundred sixty-four thousand, sixty-nine".