1097926221 has 32 divisors (see below), whose sum is σ = 1705006080. Its totient is φ = 615442176.

The previous prime is 1097926213. The next prime is 1097926261. The reversal of 1097926221 is 1226297901.

It is not a de Polignac number, because 1097926221 - 2³ = 1097926213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1097926221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097926201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1123285 + ... + 1124261.

It is an arithmetic number, because the mean of its divisors is an integer number (53281440).

Almost surely, 2^1097926221 is an apocalyptic number.

It is an amenable number.

1097926221 is a deficient number, since it is larger than the sum of its proper divisors (607079859).

1097926221 is an equidigital number, since it uses as much as digits as its factorization.

1097926221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1097926221 is about 33134.9697600586. The cubic root of 1097926221 is about 1031.6310040917.

The spelling of 1097926221 in words is "one billion, ninety-seven million, nine hundred twenty-six thousand, two hundred twenty-one".