1212234140 has 48 divisors (see below), whose sum is σ = 2745372000. Its totient is φ = 446964480.

The previous prime is 1212234139. The next prime is 1212234157. The reversal of 1212234140 is 414322121.

It is a super-2 number, since 2×1212234140² = 2939023220363079200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 207986 + ... + 213734.

It is an arithmetic number, because the mean of its divisors is an integer number (57195250).

Almost surely, 2^1212234140 is an apocalyptic number.

1212234140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212234140 is an abundant number, since it is smaller than the sum of its proper divisors (1533137860).

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

1212234140 is a wasteful number, since it uses less digits than its factorization.

1212234140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582 (or 6580 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1212234140 is about 34817.1529565529. The cubic root of 1212234140 is about 1066.2576750147.

Adding to 1212234140 its reverse (414322121), we get a palindrome (1626556261).

The spelling of 1212234140 in words is "one billion, two hundred twelve million, two hundred thirty-four thousand, one hundred forty".