1221123022 has 24 divisors (see below), whose sum is σ = 2256075504. Its totient is φ = 492553152.

The previous prime is 1221122999. The next prime is 1221123023. The reversal of 1221123022 is 2203211221.

It is a happy number.

It is a super-2 number, since 2×1221123022² = 2982282869716824968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221122987 and 1221123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221123023) 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, 364818 + ... + 368149.

It is an arithmetic number, because the mean of its divisors is an integer number (94003146).

Almost surely, 2^1221123022 is an apocalyptic number.

1221123022 is a deficient number, since it is larger than the sum of its proper divisors (1034952482).

1221123022 is a wasteful number, since it uses less digits than its factorization.

1221123022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733000 (or 732993 counting only the distinct ones).

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

The square root of 1221123022 is about 34944.5707084806. The cubic root of 1221123022 is about 1068.8574936418.

Adding to 1221123022 its reverse (2203211221), we get a palindrome (3424334243).

The spelling of 1221123022 in words is "one billion, two hundred twenty-one million, one hundred twenty-three thousand, twenty-two".