1221124059 has 16 divisors (see below), whose sum is σ = 1915489440. Its totient is φ = 766195200.

The previous prime is 1221124049. The next prime is 1221124067. The reversal of 1221124059 is 9504211221.

It is not a de Polignac number, because 1221124059 - 2¹⁷ = 1220992987 is a prime.

It is a super-2 number, since 2×1221124059² = 2982287934937270962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1221124049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1329742 + ... + 1330659.

It is an arithmetic number, because the mean of its divisors is an integer number (119718090).

Almost surely, 2^1221124059 is an apocalyptic number.

1221124059 is a deficient number, since it is larger than the sum of its proper divisors (694365381).

1221124059 is a wasteful number, since it uses less digits than its factorization.

1221124059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660427 (or 2660421 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1221124059 is about 34944.5855462617. The cubic root of 1221124059 is about 1068.8577962062.

The spelling of 1221124059 in words is "one billion, two hundred twenty-one million, one hundred twenty-four thousand, fifty-nine".