1221123202 has 32 divisors (see below), whose sum is σ = 2026620288. Its totient is φ = 548263296.

The previous prime is 1221123191. The next prime is 1221123221. The reversal of 1221123202 is 2023211221.

It is a happy number.

It is a super-2 number, since 2×1221123202² = 2982283748925465608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291958 + ... + 296110.

It is an arithmetic number, because the mean of its divisors is an integer number (63331884).

Almost surely, 2^1221123202 is an apocalyptic number.

1221123202 is a deficient number, since it is larger than the sum of its proper divisors (805497086).

1221123202 is a wasteful number, since it uses less digits than its factorization.

1221123202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221123202 is about 34944.5732839879. The cubic root of 1221123202 is about 1068.8575461603.

Adding to 1221123202 its reverse (2023211221), we get a palindrome (3244334423).

The spelling of 1221123202 in words is "one billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred two".