1211022100012 has 12 divisors (see below), whose sum is σ = 2119889575440. Its totient is φ = 605339364176.

The previous prime is 1211022100003. The next prime is 1211022100021. The reversal of 1211022100012 is 2100012201121.

It is an interprime number because it is at equal distance from previous prime (1211022100003) and next prime (1211022100021).

It is a junction number, because it is equal to n+sod(n) for n = 1211022099965 and 1211022100001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42905587 + ... + 42933802.

It is an arithmetic number, because the mean of its divisors is an integer number (176657464620).

Almost surely, 2^{1211022100012} is an apocalyptic number.

It is an amenable number.

1211022100012 is a deficient number, since it is larger than the sum of its proper divisors (908867475428).

1211022100012 is a wasteful number, since it uses less digits than its factorization.

1211022100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85842920 (or 85842918 counting only the distinct ones).

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

Adding to 1211022100012 its reverse (2100012201121), we get a palindrome (3311034301133).

The spelling of 1211022100012 in words is "one trillion, two hundred eleven billion, twenty-two million, one hundred thousand, twelve".