1011121221099 has 32 divisors (see below), whose sum is σ = 1491447564288. Its totient is φ = 604215360000.

The previous prime is 1011121221031. The next prime is 1011121221157. The reversal of 1011121221099 is 9901221211101.

It is not a de Polignac number, because 1011121221099 - 2⁸ = 1011121220843 is a prime.

It is a super-2 number, since 2×1011121221099² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011121221199) 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, 173862 + ... + 1432644.

It is an arithmetic number, because the mean of its divisors is an integer number (46607736384).

Almost surely, 2^{1011121221099} is an apocalyptic number.

1011121221099 is a deficient number, since it is larger than the sum of its proper divisors (480326343189).

1011121221099 is a wasteful number, since it uses less digits than its factorization.

1011121221099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259139.

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 1011121221099 in words is "one trillion, eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, ninety-nine".