221195354051 has 12 divisors (see below), whose sum is σ = 257345511552. Its totient is φ = 189569027088.

The previous prime is 221195354033. The next prime is 221195354077. The reversal of 221195354051 is 150453591122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-221195354051 is a prime.

It is a super-2 number, since 2×221195354051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221195353996 and 221195354014.

It is not an unprimeable number, because it can be changed into a prime (221195354011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30281 + ... + 665813.

It is an arithmetic number, because the mean of its divisors is an integer number (21445459296).

Almost surely, 2^221195354051 is an apocalyptic number.

221195354051 is a deficient number, since it is larger than the sum of its proper divisors (36150157501).

221195354051 is an equidigital number, since it uses as much as digits as its factorization.

221195354051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642650 (or 642643 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 221195354051 in words is "two hundred twenty-one billion, one hundred ninety-five million, three hundred fifty-four thousand, fifty-one".