1001010121988 has 6 divisors (see below), whose sum is σ = 1751767713486. Its totient is φ = 500505060992.

The previous prime is 1001010121961. The next prime is 1001010122033. The reversal of 1001010121988 is 8891210101001.

It can be written as a sum of positive squares in only one way, i.e., 988608626944 + 12401495044 = 994288^2 + 111362^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125126265245 + ... + 125126265252.

It is an arithmetic number, because the mean of its divisors is an integer number (291961285581).

Almost surely, 2^{1001010121988} is an apocalyptic number.

It is an amenable number.

1001010121988 is a deficient number, since it is larger than the sum of its proper divisors (750757591498).

1001010121988 is a wasteful number, since it uses less digits than its factorization.

1001010121988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250252530501 (or 250252530499 counting only the distinct ones).

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

Adding to 1001010121988 its reverse (8891210101001), we get a palindrome (9892220222989).

The spelling of 1001010121988 in words is "one trillion, one billion, ten million, one hundred twenty-one thousand, nine hundred eighty-eight".