1012121587722 has 128 divisors (see below), whose sum is σ = 2396452681728. Its totient is φ = 278942227200.

The previous prime is 1012121587717. The next prime is 1012121587723. The reversal of 1012121587722 is 2277851212101.

It is a super-2 number, since 2×1012121587722² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1012121587723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106635397 + ... + 106644887.

It is an arithmetic number, because the mean of its divisors is an integer number (18722286576).

Almost surely, 2^{1012121587722} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012121587722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198226340864).

1012121587722 is an abundant number, since it is smaller than the sum of its proper divisors (1384331094006).

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

1012121587722 is a wasteful number, since it uses less digits than its factorization.

1012121587722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124.

The product of its (nonzero) digits is 31360, while the sum is 39.

Adding to 1012121587722 its reverse (2277851212101), we get a palindrome (3289972799823).

The spelling of 1012121587722 in words is "one trillion, twelve billion, one hundred twenty-one million, five hundred eighty-seven thousand, seven hundred twenty-two".