1013551121 has 8 divisors (see below), whose sum is σ = 1112085504. Its totient is φ = 916082320.

The previous prime is 1013551103. The next prime is 1013551211. The reversal of 1013551121 is 1211553101.

It is a happy number.

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 1013551121 - 2¹⁸ = 1013288977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1013551093 and 1013551102.

It is not an unprimeable number, because it can be changed into a prime (1013551321) 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, 264401 + ... + 268206.

It is an arithmetic number, because the mean of its divisors is an integer number (139010688).

Almost surely, 2^1013551121 is an apocalyptic number.

1013551121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1013551121 is a deficient number, since it is larger than the sum of its proper divisors (98534383).

1013551121 is a wasteful number, since it uses less digits than its factorization.

1013551121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532791.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 1013551121 is about 31836.3176419636. The cubic root of 1013551121 is about 1004.4967889128.

The spelling of 1013551121 in words is "one billion, thirteen million, five hundred fifty-one thousand, one hundred twenty-one".