1211212001002 has 16 divisors (see below), whose sum is σ = 1863954892800. Its totient is φ = 589938532960.

The previous prime is 1211212000951. The next prime is 1211212001003. The reversal of 1211212001002 is 2001002121121.

It is a super-2 number, since 2×1211212001002² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211212001003) 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, 11153002 + ... + 11261077.

It is an arithmetic number, because the mean of its divisors is an integer number (116497180800).

Almost surely, 2^{1211212001002} is an apocalyptic number.

1211212001002 is a deficient number, since it is larger than the sum of its proper divisors (652742891798).

1211212001002 is a wasteful number, since it uses less digits than its factorization.

1211212001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22414781.

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

Adding to 1211212001002 its reverse (2001002121121), we get a palindrome (3212214122123).

It can be divided in two parts, 121121 and 2001002, that multiplied together give a palindrome (242363363242).

The spelling of 1211212001002 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one thousand, two".