1214221646 has 16 divisors (see below), whose sum is σ = 1987476480. Its totient is φ = 551761080.

The previous prime is 1214221643. The next prime is 1214221649. The reversal of 1214221646 is 6461224121.

It is an interprime number because it is at equal distance from previous prime (1214221643) and next prime (1214221649).

It is a super-2 number, since 2×1214221646² = 2948668411229898632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214221643) 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, 109715 + ... + 120273.

It is an arithmetic number, because the mean of its divisors is an integer number (124217280).

Almost surely, 2^1214221646 is an apocalyptic number.

1214221646 is a deficient number, since it is larger than the sum of its proper divisors (773254834).

1214221646 is a wasteful number, since it uses less digits than its factorization.

1214221646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15799.

The product of its digits is 4608, while the sum is 29.

The square root of 1214221646 is about 34845.6833194587. The cubic root of 1214221646 is about 1066.8400807682.

Adding to 1214221646 its reverse (6461224121), we get a palindrome (7675445767).

The spelling of 1214221646 in words is "one billion, two hundred fourteen million, two hundred twenty-one thousand, six hundred forty-six".