1021011121987 has 8 divisors (see below), whose sum is σ = 1074772337360. Its totient is φ = 967252285440.

The previous prime is 1021011121967. The next prime is 1021011122023. The reversal of 1021011121987 is 7891211101201.

It is a happy number.

1021011121987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021011121987 - 2³¹ = 1018863638339 is a prime.

It is a super-2 number, since 2×1021011121987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021011121967) 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, 322603 + ... + 1464955.

It is an arithmetic number, because the mean of its divisors is an integer number (134346542170).

Almost surely, 2^{1021011121987} is an apocalyptic number.

1021011121987 is a deficient number, since it is larger than the sum of its proper divisors (53761215373).

1021011121987 is a wasteful number, since it uses less digits than its factorization.

1021011121987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189413.

The product of its (nonzero) digits is 2016, while the sum is 34.

The spelling of 1021011121987 in words is "one trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, nine hundred eighty-seven".