1220100222021 has 32 divisors (see below), whose sum is σ = 1784215104000. Its totient is φ = 738664774848.

The previous prime is 1220100222013. The next prime is 1220100222031. The reversal of 1220100222021 is 1202220010221.

It is not a de Polignac number, because 1220100222021 - 2³ = 1220100222013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100222031) 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 31 ways as a sum of consecutive naturals, for example, 2425315 + ... + 2884848.

It is an arithmetic number, because the mean of its divisors is an integer number (55756722000).

Almost surely, 2^{1220100222021} is an apocalyptic number.

It is an amenable number.

1220100222021 is a deficient number, since it is larger than the sum of its proper divisors (564114881979).

1220100222021 is a wasteful number, since it uses less digits than its factorization.

1220100222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5310353.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220100222021 its reverse (1202220010221), we get a palindrome (2422320232242).

The spelling of 1220100222021 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred twenty-two thousand, twenty-one".