1151420222 has 4 divisors (see below), whose sum is σ = 1727130336. Its totient is φ = 575710110.

The previous prime is 1151420219. The next prime is 1151420243. The reversal of 1151420222 is 2220241511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2220241511 = 67 ⋅33137933.

It is a junction number, because it is equal to n+sod(n) for n = 1151420194 and 1151420203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287855054 + ... + 287855057.

It is an arithmetic number, because the mean of its divisors is an integer number (431782584).

Almost surely, 2^1151420222 is an apocalyptic number.

1151420222 is a deficient number, since it is larger than the sum of its proper divisors (575710114).

1151420222 is an equidigital number, since it uses as much as digits as its factorization.

1151420222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575710113.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1151420222 is about 33932.5834854937. The cubic root of 1151420222 is about 1048.1206661121.

Adding to 1151420222 its reverse (2220241511), we get a palindrome (3371661733).

The spelling of 1151420222 in words is "one billion, one hundred fifty-one million, four hundred twenty thousand, two hundred twenty-two".