1211110201992 has 128 divisors (see below), whose sum is σ = 3262187520000. Its totient is φ = 373596875520.

The previous prime is 1211110201963. The next prime is 1211110201993. The reversal of 1211110201992 is 2991020111121.

It is not an unprimeable number, because it can be changed into a prime (1211110201993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92381134 + ... + 92394242.

It is an arithmetic number, because the mean of its divisors is an integer number (25485840000).

Almost surely, 2^{1211110201992} is an apocalyptic number.

1211110201992 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 1211110201992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1631093760000).

1211110201992 is an abundant number, since it is smaller than the sum of its proper divisors (2051077318008).

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

1211110201992 is a wasteful number, since it uses less digits than its factorization.

1211110201992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18571 (or 18567 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 1211110201992 in words is "one trillion, two hundred eleven billion, one hundred ten million, two hundred one thousand, nine hundred ninety-two".