2091199210021 has 8 divisors (see below), whose sum is σ = 2150108892288. Its totient is φ = 2032665948000.

The previous prime is 2091199210019. The next prime is 2091199210027. The reversal of 2091199210021 is 1200129911902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091199210021 - 2¹ = 2091199210019 is a prime.

It is a super-2 number, since 2×2091199210021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091199210027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94093795 + ... + 94116016.

It is an arithmetic number, because the mean of its divisors is an integer number (268763611536).

Almost surely, 2^{2091199210021} is an apocalyptic number.

It is an amenable number.

2091199210021 is a deficient number, since it is larger than the sum of its proper divisors (58909682267).

2091199210021 is a wasteful number, since it uses less digits than its factorization.

2091199210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188210123.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 2091199210021 in words is "two trillion, ninety-one billion, one hundred ninety-nine million, two hundred ten thousand, twenty-one".