121072019806 has 16 divisors (see below), whose sum is σ = 198493787520. Its totient is φ = 55137162240.

The previous prime is 121072019777. The next prime is 121072019807. The reversal of 121072019806 is 608910270121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121072019807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57433491 + ... + 57435598.

It is an arithmetic number, because the mean of its divisors is an integer number (12405861720).

Almost surely, 2^121072019806 is an apocalyptic number.

121072019806 is a deficient number, since it is larger than the sum of its proper divisors (77421767714).

121072019806 is a wasteful number, since it uses less digits than its factorization.

121072019806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114869139.

The product of its (nonzero) digits is 12096, while the sum is 37.

Adding to 121072019806 its reverse (608910270121), we get a palindrome (729982289927).

The spelling of 121072019806 in words is "one hundred twenty-one billion, seventy-two million, nineteen thousand, eight hundred six".