1121222001000 has 64 divisors (see below), whose sum is σ = 3498212652480. Its totient is φ = 298992532800.

The previous prime is 1121222000971. The next prime is 1121222001007. The reversal of 1121222001000 is 1002221211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1121222001007) 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, 186867334 + ... + 186873333.

It is an arithmetic number, because the mean of its divisors is an integer number (54659572695).

Almost surely, 2^{1121222001000} is an apocalyptic number.

1121222001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121222001000 is an abundant number, since it is smaller than the sum of its proper divisors (2376990651480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121222001000 is a wasteful number, since it uses less digits than its factorization.

1121222001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373740691 (or 373740677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1121222001000 its reverse (1002221211), we get a palindrome (1122224222211).

The spelling of 1121222001000 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, one thousand".