1212013231 has 32 divisors (see below), whose sum is σ = 1484937216. Its totient is φ = 974160000.

The previous prime is 1212013217. The next prime is 1212013237. The reversal of 1212013231 is 1323102121.

It is not a de Polignac number, because 1212013231 - 2⁹ = 1212012719 is a prime.

It is a super-2 number, since 2×1212013231² = 2937952144238118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212013237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446380 + ... + 449086.

It is an arithmetic number, because the mean of its divisors is an integer number (46404288).

Almost surely, 2^1212013231 is an apocalyptic number.

1212013231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212013231 is a deficient number, since it is larger than the sum of its proper divisors (272923985).

1212013231 is a wasteful number, since it uses less digits than its factorization.

1212013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1212013231 is about 34813.9803958123. The cubic root of 1212013231 is about 1066.1929019871.

Adding to 1212013231 its reverse (1323102121), we get a palindrome (2535115352).

The spelling of 1212013231 in words is "one billion, two hundred twelve million, thirteen thousand, two hundred thirty-one".