1220002129 has 8 divisors (see below), whose sum is σ = 1250477568. Its totient is φ = 1189887600.

The previous prime is 1220002097. The next prime is 1220002139. The reversal of 1220002129 is 9212000221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220002129 - 2⁵ = 1220002097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220002139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83377 + ... + 96910.

It is an arithmetic number, because the mean of its divisors is an integer number (156309696).

Almost surely, 2^1220002129 is an apocalyptic number.

It is an amenable number.

1220002129 is a deficient number, since it is larger than the sum of its proper divisors (30475439).

1220002129 is a wasteful number, since it uses less digits than its factorization.

1220002129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180455.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1220002129 is about 34928.5288696790. The cubic root of 1220002129 is about 1068.5303517058.

It can be divided in two parts, 122000212 and 9, that added together give a palindrome (122000221).

The spelling of 1220002129 in words is "one billion, two hundred twenty million, two thousand, one hundred twenty-nine".