1216101430 has 32 divisors (see below), whose sum is σ = 2252038464. Its totient is φ = 472607616.

The previous prime is 1216101421. The next prime is 1216101473. The reversal of 1216101430 is 341016121.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1216101398 and 1216101407.

It is a congruent number.

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, 43452 + ... + 65728.

It is an arithmetic number, because the mean of its divisors is an integer number (70376202).

Almost surely, 2^1216101430 is an apocalyptic number.

1216101430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216101430 is a deficient number, since it is larger than the sum of its proper divisors (1035937034).

1216101430 is a wasteful number, since it uses less digits than its factorization.

1216101430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22440.

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

The square root of 1216101430 is about 34872.6458703666. The cubic root of 1216101430 is about 1067.3903358544.

Adding to 1216101430 its reverse (341016121), we get a palindrome (1557117551).

The spelling of 1216101430 in words is "one billion, two hundred sixteen million, one hundred one thousand, four hundred thirty".