1211102021002 has 8 divisors (see below), whose sum is σ = 1816657805700. Its totient is φ = 605549419104.

The previous prime is 1211102020981. The next prime is 1211102021009. The reversal of 1211102021002 is 2001202011121.

It can be written as a sum of positive squares in 2 ways, for example, as 1046281448641 + 164820572361 = 1022879^2 + 405981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1211102021009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778324 + ... + 1740112.

Almost surely, 2^{1211102021002} is an apocalyptic number.

1211102021002 is a deficient number, since it is larger than the sum of its proper divisors (605555784698).

1211102021002 is an equidigital number, since it uses as much as digits as its factorization.

1211102021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591400.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211102021002 its reverse (2001202011121), we get a palindrome (3212304032123).

The spelling of 1211102021002 in words is "one trillion, two hundred eleven billion, one hundred two million, twenty-one thousand, two".