1221122001012 has 96 divisors (see below), whose sum is σ = 2944869782400. Its totient is φ = 393639247872.

The previous prime is 1221122000983. The next prime is 1221122001017. The reversal of 1221122001012 is 2101002211221.

It is a super-2 number, since 2×1221122001012² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221122000982 and 1221122001000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221122001017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20074708 + ... + 20135444.

It is an arithmetic number, because the mean of its divisors is an integer number (30675726900).

Almost surely, 2^{1221122001012} is an apocalyptic number.

1221122001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221122001012 is an abundant number, since it is smaller than the sum of its proper divisors (1723747781388).

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

1221122001012 is a wasteful number, since it uses less digits than its factorization.

1221122001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61265 (or 61263 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221122001012 its reverse (2101002211221), we get a palindrome (3322124212233).

The spelling of 1221122001012 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one thousand, twelve".