1211002122112 has 16 divisors (see below), whose sum is σ = 2412543290400. Its totient is φ = 605501060992.

The previous prime is 1211002122103. The next prime is 1211002122119. The reversal of 1211002122112 is 2112212001121.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×1211002122112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211002122119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4730476912 + ... + 4730477167.

It is an arithmetic number, because the mean of its divisors is an integer number (150783955650).

Almost surely, 2^{1211002122112} is an apocalyptic number.

It is an amenable number.

1211002122112 is a deficient number, since it is larger than the sum of its proper divisors (1201541168288).

1211002122112 is an frugal number, since it uses more digits than its factorization.

1211002122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9460954093 (or 9460954081 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211002122112 its reverse (2112212001121), we get a palindrome (3323214123233).

The spelling of 1211002122112 in words is "one trillion, two hundred eleven billion, two million, one hundred twenty-two thousand, one hundred twelve".