1211000101988 has 12 divisors (see below), whose sum is σ = 2119530963900. Its totient is φ = 605419826592.

The previous prime is 1211000101951. The next prime is 1211000102017. The reversal of 1211000101988 is 8891010001121.

It can be written as a sum of positive squares in 2 ways, for example, as 534957662464 + 676042439524 = 731408^2 + 822218^2 .

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, 20022131 + ... + 20082522.

It is an arithmetic number, because the mean of its divisors is an integer number (176627580325).

Almost surely, 2^{1211000101988} is an apocalyptic number.

It is an amenable number.

1211000101988 is a deficient number, since it is larger than the sum of its proper divisors (908530861912).

1211000101988 is a wasteful number, since it uses less digits than its factorization.

1211000101988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40112206 (or 40112204 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 32.

The spelling of 1211000101988 in words is "one trillion, two hundred eleven billion, one hundred one thousand, nine hundred eighty-eight".