121751560619 has 16 divisors (see below), whose sum is σ = 142215937920. Its totient is φ = 103195223040.

The previous prime is 121751560583. The next prime is 121751560631. The reversal of 121751560619 is 916065157121.

It is not a de Polignac number, because 121751560619 - 2¹² = 121751556523 is a prime.

It is a super-2 number, since 2×121751560619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121751560619.

It is not an unprimeable number, because it can be changed into a prime (121751560699) 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, 6709379 + ... + 6727500.

It is an arithmetic number, because the mean of its divisors is an integer number (8888496120).

Almost surely, 2^121751560619 is an apocalyptic number.

121751560619 is a deficient number, since it is larger than the sum of its proper divisors (20464377301).

121751560619 is a wasteful number, since it uses less digits than its factorization.

121751560619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13436950.

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 121751560619 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred sixty thousand, six hundred nineteen".