1001121055 has 16 divisors (see below), whose sum is σ = 1341039744. Its totient is φ = 711154080.

The previous prime is 1001121053. The next prime is 1001121059. The reversal of 1001121055 is 5501211001.

It is not a de Polignac number, because 1001121055 - 2¹ = 1001121053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001121053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209289 + ... + 214018.

It is an arithmetic number, because the mean of its divisors is an integer number (83814984).

Almost surely, 2^1001121055 is an apocalyptic number.

1001121055 is a deficient number, since it is larger than the sum of its proper divisors (339918689).

1001121055 is a wasteful number, since it uses less digits than its factorization.

1001121055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423366.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1001121055 is about 31640.4970725809. The cubic root of 1001121055 is about 1000.3735454464.

Adding to 1001121055 its reverse (5501211001), we get a palindrome (6502332056).

The spelling of 1001121055 in words is "one billion, one million, one hundred twenty-one thousand, fifty-five".