1121020200102 has 128 divisors (see below), whose sum is σ = 2547855917568. Its totient is φ = 325828224000.

The previous prime is 1121020200061. The next prime is 1121020200107. The reversal of 1121020200102 is 2010020201211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121020200107) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57457833 + ... + 57477339.

It is an arithmetic number, because the mean of its divisors is an integer number (19905124356).

Almost surely, 2^{1121020200102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121020200102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273927958784).

1121020200102 is an abundant number, since it is smaller than the sum of its proper divisors (1426835717466).

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

1121020200102 is a wasteful number, since it uses less digits than its factorization.

1121020200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19894.

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

Adding to 1121020200102 its reverse (2010020201211), we get a palindrome (3131040401313).

The spelling of 1121020200102 in words is "one trillion, one hundred twenty-one billion, twenty million, two hundred thousand, one hundred two".