1211215023 has 12 divisors (see below), whose sum is σ = 1757242968. Its totient is φ = 803918160.

The previous prime is 1211215009. The next prime is 1211215063. The reversal of 1211215023 is 3205121121.

It is not a de Polignac number, because 1211215023 - 2¹² = 1211210927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211214987 and 1211215005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211215063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294388 + ... + 298473.

It is an arithmetic number, because the mean of its divisors is an integer number (146436914).

Almost surely, 2^1211215023 is an apocalyptic number.

1211215023 is a deficient number, since it is larger than the sum of its proper divisors (546027945).

1211215023 is a wasteful number, since it uses less digits than its factorization.

1211215023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593094 (or 593091 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1211215023 is about 34802.5146074246. The cubic root of 1211215023 is about 1065.9587927169.

Adding to 1211215023 its reverse (3205121121), we get a palindrome (4416336144).

The spelling of 1211215023 in words is "one billion, two hundred eleven million, two hundred fifteen thousand, twenty-three".