1221221122032 has 40 divisors (see below), whose sum is σ = 3157645740496. Its totient is φ = 406709254656.

The previous prime is 1221221122031. The next prime is 1221221122061. The reversal of 1221221122032 is 2302211221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221221122031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11334973 + ... + 11442204.

Almost surely, 2^{1221221122032} is an apocalyptic number.

1221221122032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221221122032 is an abundant number, since it is smaller than the sum of its proper divisors (1936424618464).

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

1221221122032 is a wasteful number, since it uses less digits than its factorization.

1221221122032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22778305 (or 22778299 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1221221122032 its reverse (2302211221221), we get a palindrome (3523432343253).

The spelling of 1221221122032 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, thirty-two".