1242210011 has 4 divisors (see below), whose sum is σ = 1419668592. Its totient is φ = 1064751432.

The previous prime is 1242210007. The next prime is 1242210023. The reversal of 1242210011 is 1100122421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1100122421 = 83 ⋅13254487.

It is a cyclic number.

It is not a de Polignac number, because 1242210011 - 2² = 1242210007 is a prime.

It is a super-2 number, since 2×1242210011² = 3086171422857240242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242210001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88729280 + ... + 88729293.

It is an arithmetic number, because the mean of its divisors is an integer number (354917148).

Almost surely, 2^1242210011 is an apocalyptic number.

1242210011 is a deficient number, since it is larger than the sum of its proper divisors (177458581).

1242210011 is an equidigital number, since it uses as much as digits as its factorization.

1242210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177458580.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1242210011 is about 35244.9998013903. Note that the first 3 decimals coincide. The cubic root of 1242210011 is about 1074.9749439987.

Adding to 1242210011 its sum of digits (14), we get a square (1242210025 = 35245²).

Adding to 1242210011 its reverse (1100122421), we get a palindrome (2342332432).

The spelling of 1242210011 in words is "one billion, two hundred forty-two million, two hundred ten thousand, eleven".