1220879122 has 4 divisors (see below), whose sum is σ = 1831318686. Its totient is φ = 610439560.

The previous prime is 1220879111. The next prime is 1220879137. The reversal of 1220879122 is 2219780221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2219780221 = 41 ⋅54140981.

It can be written as a sum of positive squares in only one way, i.e., 841058001 + 379821121 = 29001^2 + 19489^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305219779 + ... + 305219782.

Almost surely, 2^1220879122 is an apocalyptic number.

1220879122 is a deficient number, since it is larger than the sum of its proper divisors (610439564).

1220879122 is an equidigital number, since it uses as much as digits as its factorization.

1220879122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610439563.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1220879122 is about 34941.0807216949. The cubic root of 1220879122 is about 1068.7863264467.

The spelling of 1220879122 in words is "one billion, two hundred twenty million, eight hundred seventy-nine thousand, one hundred twenty-two".