121211627716 has 12 divisors (see below), whose sum is σ = 224598016188. Its totient is φ = 57040765952.

The previous prime is 121211627617. The next prime is 121211627777. The reversal of 121211627716 is 617726112121.

It can be written as a sum of positive squares in 2 ways, for example, as 72547267716 + 48664360000 = 269346^2 + 220600^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891261901 + ... + 891262036.

It is an arithmetic number, because the mean of its divisors is an integer number (18716501349).

Almost surely, 2^121211627716 is an apocalyptic number.

It is an amenable number.

121211627716 is a deficient number, since it is larger than the sum of its proper divisors (103386388472).

121211627716 is a wasteful number, since it uses less digits than its factorization.

121211627716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782523958 (or 1782523956 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

Adding to 121211627716 its reverse (617726112121), we get a palindrome (738937739837).

The spelling of 121211627716 in words is "one hundred twenty-one billion, two hundred eleven million, six hundred twenty-seven thousand, seven hundred sixteen".