2111121001200 has 120 divisors (see below), whose sum is σ = 6828281219968. Its totient is φ = 557499882240.

The previous prime is 2111121001189. The next prime is 2111121001247. The reversal of 2111121001200 is 21001211112.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8416534 + ... + 8663733.

Almost surely, 2^{2111121001200} is an apocalyptic number.

2111121001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111121001200 is an abundant number, since it is smaller than the sum of its proper divisors (4717160218768).

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

2111121001200 is a wasteful number, since it uses less digits than its factorization.

2111121001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17080391 (or 17080380 counting only the distinct ones).

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

Adding to 2111121001200 its reverse (21001211112), we get a palindrome (2132122212312).

The spelling of 2111121001200 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, one thousand, two hundred".