1121221102020 has 96 divisors (see below), whose sum is σ = 3148568793216. Its totient is φ = 298121856000.

The previous prime is 1121221102003. The next prime is 1121221102021. The reversal of 1121221102020 is 202011221211.

It is a super-2 number, since 2×1121221102020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1121221102021) 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, 39772330 + ... + 39800510.

It is an arithmetic number, because the mean of its divisors is an integer number (32797591596).

Almost surely, 2^{1121221102020} is an apocalyptic number.

1121221102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121221102020 is an abundant number, since it is smaller than the sum of its proper divisors (2027347691196).

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

1121221102020 is a wasteful number, since it uses less digits than its factorization.

1121221102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30101 (or 30099 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1121221102020 its reverse (202011221211), we get a palindrome (1323232323231).

The spelling of 1121221102020 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, twenty".