1212021100153 has 2 divisors, whose sum is σ = 1212021100154. Its totient is φ = 1212021100152.

The previous prime is 1212021100111. The next prime is 1212021100163. The reversal of 1212021100153 is 3510011202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 710519183929 + 501501916224 = 842923^2 + 708168^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212021100153 - 2³³ = 1203431165561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212021100153.

It is not a weakly prime, because it can be changed into another prime (1212021100163) 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 as a sum of consecutive naturals, namely, 606010550076 + 606010550077.

It is an arithmetic number, because the mean of its divisors is an integer number (606010550077).

Almost surely, 2^{1212021100153} is an apocalyptic number.

It is an amenable number.

1212021100153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021100153 is an equidigital number, since it uses as much as digits as its factorization.

1212021100153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 1212021100153 its reverse (3510011202121), we get a palindrome (4722032302274).

The spelling of 1212021100153 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred thousand, one hundred fifty-three".