1221110298954 has 144 divisors (see below), whose sum is σ = 3324907790568. Its totient is φ = 321034178304.

The previous prime is 1221110298953. The next prime is 1221110298959. The reversal of 1221110298954 is 4598920111221.

It can be written as a sum of positive squares in 4 ways, for example, as 445592295729 + 775518003225 = 667527^2 + 880635^2 .

It is a super-2 number, since 2×1221110298954² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221110298953) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3466744 + ... + 3802700.

Almost surely, 2^{1221110298954} is an apocalyptic number.

1221110298954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221110298954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662453895284).

1221110298954 is an abundant number, since it is smaller than the sum of its proper divisors (2103797491614).

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

1221110298954 is a wasteful number, since it uses less digits than its factorization.

1221110298954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336309 (or 336299 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 1221110298954 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred ninety-eight thousand, nine hundred fifty-four".