1211021000112 has 240 divisors, whose sum is σ = 4098151701504. Its totient is φ = 304403904000.

The previous prime is 1211021000071. The next prime is 1211021000153. The reversal of 1211021000112 is 2110001201121.

It is an interprime number because it is at equal distance from previous prime (1211021000071) and next prime (1211021000153).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47062 + ... + 1557002.

Almost surely, 2^{1211021000112} is an apocalyptic number.

1211021000112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211021000112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049075850752).

1211021000112 is an abundant number, since it is smaller than the sum of its proper divisors (2887130701392).

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

1211021000112 is a wasteful number, since it uses less digits than its factorization.

1211021000112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510008 (or 1509995 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211021000112 its reverse (2110001201121), we get a palindrome (3321022201233).

The spelling of 1211021000112 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred twelve", and thus it is an aban number.