191120202451 has 16 divisors (see below), whose sum is σ = 199848140800. Its totient is φ = 182553976800.

The previous prime is 191120202431. The next prime is 191120202457. The reversal of 191120202451 is 154202021191.

It is a cyclic number.

It is not a de Polignac number, because 191120202451 - 2¹³ = 191120194259 is a prime.

It is a super-2 number, since 2×191120202451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191120202457) 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, 8660890 + ... + 8682928.

It is an arithmetic number, because the mean of its divisors is an integer number (12490508800).

Almost surely, 2^191120202451 is an apocalyptic number.

191120202451 is a deficient number, since it is larger than the sum of its proper divisors (8727938349).

191120202451 is a wasteful number, since it uses less digits than its factorization.

191120202451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25690.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 191120202451 in words is "one hundred ninety-one billion, one hundred twenty million, two hundred two thousand, four hundred fifty-one".