1021123111122 has 160 divisors (see below), whose sum is σ = 2434991803200. Its totient is φ = 318922780032.

The previous prime is 1021123111081. The next prime is 1021123111147. The reversal of 1021123111122 is 2211113211201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021123111095 and 1021123111104.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 233504128 + ... + 233508500.

It is an arithmetic number, because the mean of its divisors is an integer number (15218698770).

Almost surely, 2^{1021123111122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021123111122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217495901600).

1021123111122 is an abundant number, since it is smaller than the sum of its proper divisors (1413868692078).

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

1021123111122 is a wasteful number, since it uses less digits than its factorization.

1021123111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222 (or 5213 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1021123111122 its reverse (2211113211201), we get a palindrome (3232236322323).

The spelling of 1021123111122 in words is "one trillion, twenty-one billion, one hundred twenty-three million, one hundred eleven thousand, one hundred twenty-two".