1121487087721 has 32 divisors (see below), whose sum is σ = 1510678084608. Its totient is φ = 804036248640.

The previous prime is 1121487087697. The next prime is 1121487087739. The reversal of 1121487087721 is 1277807841211.

It is a cyclic number.

It is not a de Polignac number, because 1121487087721 - 2⁹ = 1121487087209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121487087751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1517395 + ... + 2132008.

It is an arithmetic number, because the mean of its divisors is an integer number (47208690144).

Almost surely, 2^{1121487087721} is an apocalyptic number.

1121487087721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121487087721 is a deficient number, since it is larger than the sum of its proper divisors (389190996887).

1121487087721 is a wasteful number, since it uses less digits than its factorization.

1121487087721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649741.

The product of its (nonzero) digits is 351232, while the sum is 49.

The spelling of 1121487087721 in words is "one trillion, one hundred twenty-one billion, four hundred eighty-seven million, eighty-seven thousand, seven hundred twenty-one".