1211002120002 has 16 divisors (see below), whose sum is σ = 2423563823520. Its totient is φ = 403407442752.

The previous prime is 1211002119983. The next prime is 1211002120007. The reversal of 1211002120002 is 2000212001121.

It is a super-2 number, since 2×1211002120002² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211002120002.

It is not an unprimeable number, because it can be changed into a prime (1211002120007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64972552 + ... + 64991187.

It is an arithmetic number, because the mean of its divisors is an integer number (151472738970).

Almost surely, 2^{1211002120002} is an apocalyptic number.

1211002120002 is an abundant number, since it is smaller than the sum of its proper divisors (1212561703518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211002120002 is a wasteful number, since it uses less digits than its factorization.

1211002120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129965297.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1211002120002 its reverse (2000212001121), we get a palindrome (3211214121123).

The spelling of 1211002120002 in words is "one trillion, two hundred eleven billion, two million, one hundred twenty thousand, two".