1211214340 has 36 divisors (see below), whose sum is σ = 2958825996. Its totient is φ = 415273152.

The previous prime is 1211214313. The next prime is 1211214371. The reversal of 1211214340 is 434121121.

It can be written as a sum of positive squares in 2 ways, for example, as 481890304 + 729324036 = 21952^2 + 27006^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 616987 + ... + 618946.

It is an arithmetic number, because the mean of its divisors is an integer number (82189611).

Almost surely, 2^1211214340 is an apocalyptic number.

1211214340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211214340 is an abundant number, since it is smaller than the sum of its proper divisors (1747611656).

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

1211214340 is a wasteful number, since it uses less digits than its factorization.

1211214340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235956 (or 1235947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1211214340 is about 34802.5047949138. The cubic root of 1211214340 is about 1065.9585923533.

Adding to 1211214340 its reverse (434121121), we get a palindrome (1645335461).

It can be divided in two parts, 121 and 1214340, that added together give a triangular number (1214461 = T₁₅₅₈).

The spelling of 1211214340 in words is "one billion, two hundred eleven million, two hundred fourteen thousand, three hundred forty".