1201021122 has 64 divisors (see below), whose sum is σ = 2924651520. Its totient is φ = 321153984.

The previous prime is 1201021111. The next prime is 1201021139. The reversal of 1201021122 is 2211201021.

It is a junction number, because it is equal to n+sod(n) for n = 1201021098 and 1201021107.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57168 + ... + 75300.

It is an arithmetic number, because the mean of its divisors is an integer number (45697680).

Almost surely, 2^1201021122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201021122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462325760).

1201021122 is an abundant number, since it is smaller than the sum of its proper divisors (1723630398).

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

1201021122 is a wasteful number, since it uses less digits than its factorization.

1201021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18247.

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

The square root of 1201021122 is about 34655.7516438469. The cubic root of 1201021122 is about 1062.9599015172.

Adding to 1201021122 its reverse (2211201021), we get a palindrome (3412222143).

The spelling of 1201021122 in words is "one billion, two hundred one million, twenty-one thousand, one hundred twenty-two".