1212101131 has 2 divisors, whose sum is σ = 1212101132. Its totient is φ = 1212101130.

The previous prime is 1212101119. The next prime is 1212101153. The reversal of 1212101131 is 1311012121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212101131 is a prime.

It is a super-2 number, since 2×1212101131² = 2938378303542958322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212101161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606050565 + 606050566.

It is an arithmetic number, because the mean of its divisors is an integer number (606050566).

Almost surely, 2^1212101131 is an apocalyptic number.

1212101131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212101131 is an equidigital number, since it uses as much as digits as its factorization.

1212101131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1212101131 is about 34815.2427967981. The cubic root of 1212101131 is about 1066.2186762081.

Adding to 1212101131 its reverse (1311012121), we get a palindrome (2523113252).

The spelling of 1212101131 in words is "one billion, two hundred twelve million, one hundred one thousand, one hundred thirty-one".