1212213210 has 32 divisors (see below), whose sum is σ = 3133105920. Its totient is φ = 298390848.

The previous prime is 1212213193. The next prime is 1212213227. The reversal of 1212213210 is 123122121.

It is an interprime number because it is at equal distance from previous prime (1212213193) and next prime (1212213227).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212213210.

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, 1553730 + ... + 1554509.

It is an arithmetic number, because the mean of its divisors is an integer number (97909560).

Almost surely, 2^1212213210 is an apocalyptic number.

1212213210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212213210 is an abundant number, since it is smaller than the sum of its proper divisors (1920892710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212213210 is a wasteful number, since it uses less digits than its factorization.

1212213210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108262.

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

The square root of 1212213210 is about 34816.8523850161. The cubic root of 1212213210 is about 1066.2515384385.

Adding to 1212213210 its reverse (123122121), we get a palindrome (1335335331).

The spelling of 1212213210 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, two hundred ten".