1222002121021 has 16 divisors (see below), whose sum is σ = 1365775084800. Its totient is φ = 1083682777600.

The previous prime is 1222002120991. The next prime is 1222002121037. The reversal of 1222002121021 is 1201212002221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1222002121021 - 2³⁷ = 1084563167549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222002120986 and 1222002121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222002121421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3612540 + ... + 3936298.

It is an arithmetic number, because the mean of its divisors is an integer number (85360942800).

Almost surely, 2^{1222002121021} is an apocalyptic number.

1222002121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222002121021 is a deficient number, since it is larger than the sum of its proper divisors (143772963779).

1222002121021 is a wasteful number, since it uses less digits than its factorization.

1222002121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332180.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1222002121021 its reverse (1201212002221), we get a palindrome (2423214123242).

The spelling of 1222002121021 in words is "one trillion, two hundred twenty-two billion, two million, one hundred twenty-one thousand, twenty-one".