1211200102191 has 16 divisors (see below), whose sum is σ = 1653961755776. Its totient is φ = 787986039456.

The previous prime is 1211200102183. The next prime is 1211200102223. The reversal of 1211200102191 is 1912010021121.

It is not a de Polignac number, because 1211200102191 - 2³ = 1211200102183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211200102121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4035520 + ... + 4325253.

It is an arithmetic number, because the mean of its divisors is an integer number (103372609736).

Almost surely, 2^{1211200102191} is an apocalyptic number.

1211200102191 is a deficient number, since it is larger than the sum of its proper divisors (442761653585).

1211200102191 is a wasteful number, since it uses less digits than its factorization.

1211200102191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8361942.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1211200102191 in words is "one trillion, two hundred eleven billion, two hundred million, one hundred two thousand, one hundred ninety-one".