1001222011020 has 192 divisors, whose sum is σ = 3561122589696. Its totient is φ = 204120683520.

The previous prime is 1001222010931. The next prime is 1001222011043. The reversal of 1001222011020 is 201102221001.

It is a super-4 number, since 4×1001222011020⁴ (a number of 49 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1001222010987 and 1001222011005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1799619 + ... + 2289338.

It is an arithmetic number, because the mean of its divisors is an integer number (18547513488).

Almost surely, 2^{1001222011020} is an apocalyptic number.

1001222011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001222011020 is an abundant number, since it is smaller than the sum of its proper divisors (2559900578676).

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

1001222011020 is a wasteful number, since it uses less digits than its factorization.

1001222011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089040 (or 4089038 counting only the distinct ones).

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

Adding to 1001222011020 its reverse (201102221001), we get a palindrome (1202324232021).

The spelling of 1001222011020 in words is "one trillion, one billion, two hundred twenty-two million, eleven thousand, twenty".