1204212029921 has 2 divisors, whose sum is σ = 1204212029922. Its totient is φ = 1204212029920.

The previous prime is 1204212029857. The next prime is 1204212030029. The reversal of 1204212029921 is 1299202124021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699792479296 + 504419550625 = 836536^2 + 710225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204212029921 - 2⁶ = 1204212029857 is a prime.

It is a super-2 number, since 2×1204212029921² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1204212029021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602106014960 + 602106014961.

It is an arithmetic number, because the mean of its divisors is an integer number (602106014961).

Almost surely, 2^{1204212029921} is an apocalyptic number.

It is an amenable number.

1204212029921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204212029921 is an equidigital number, since it uses as much as digits as its factorization.

1204212029921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 1204212029921 in words is "one trillion, two hundred four billion, two hundred twelve million, twenty-nine thousand, nine hundred twenty-one".