1021121112102 has 192 divisors, whose sum is σ = 2552845994496. Its totient is φ = 266602752000.

The previous prime is 1021121112061. The next prime is 1021121112169. The reversal of 1021121112102 is 2012111211201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 308214798 + ... + 308218110.

It is an arithmetic number, because the mean of its divisors is an integer number (13296072888).

Almost surely, 2^{1021121112102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021121112102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276422997248).

1021121112102 is an abundant number, since it is smaller than the sum of its proper divisors (1531724882394).

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

1021121112102 is a wasteful number, since it uses less digits than its factorization.

1021121112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775 (or 3762 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1021121112102 its reverse (2012111211201), we get a palindrome (3033232323303).

Subtracting 1021121112102 from its reverse (2012111211201), we obtain a palindrome (990990099099).

It can be divided in two parts, 10 and 21121112102, that added together give a palindrome (21121112112).

The spelling of 1021121112102 in words is "one trillion, twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred two".