1021121223 has 16 divisors (see below), whose sum is σ = 1386429696. Its totient is φ = 668393600.

The previous prime is 1021121209. The next prime is 1021121243. The reversal of 1021121223 is 3221211201.

It is a cyclic number.

It is not a de Polignac number, because 1021121223 - 2⁵ = 1021121191 is a prime.

It is a super-2 number, since 2×1021121223² = 2085377104122031458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22198 + ... + 50348.

It is an arithmetic number, because the mean of its divisors is an integer number (86651856).

Almost surely, 2^1021121223 is an apocalyptic number.

1021121223 is a deficient number, since it is larger than the sum of its proper divisors (365308473).

1021121223 is a wasteful number, since it uses less digits than its factorization.

1021121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28374.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1021121223 is about 31954.9874511006. The cubic root of 1021121223 is about 1006.9914138854.

Adding to 1021121223 its reverse (3221211201), we get a palindrome (4242332424).

The spelling of 1021121223 in words is "one billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-three".