1212212021002 has 4 divisors (see below), whose sum is σ = 1818318031506. Its totient is φ = 606106010500.

The previous prime is 1212212020967. The next prime is 1212212021003. The reversal of 1212212021002 is 2001202122121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 975608577441 + 236603443561 = 987729^2 + 486419^2 .

It is not an unprimeable number, because it can be changed into a prime (1212212021003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303053005249 + ... + 303053005252.

Almost surely, 2^{1212212021002} is an apocalyptic number.

1212212021002 is a deficient number, since it is larger than the sum of its proper divisors (606106010504).

1212212021002 is an equidigital number, since it uses as much as digits as its factorization.

1212212021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606106010503.

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

Adding to 1212212021002 its reverse (2001202122121), we get a palindrome (3213414143123).

The spelling of 1212212021002 in words is "one trillion, two hundred twelve billion, two hundred twelve million, twenty-one thousand, two".