1212012011 has 12 divisors (see below), whose sum is σ = 1420190568. Its totient is φ = 1031278752.

The previous prime is 1212012007. The next prime is 1212012013. The reversal of 1212012011 is 1102102121.

It is not a de Polignac number, because 1212012011 - 2² = 1212012007 is a prime.

It is a super-2 number, since 2×1212012011² = 2937946229616528242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212011983 and 1212012001.

It is not an unprimeable number, because it can be changed into a prime (1212012013) 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, 83561 + ... + 96986.

It is an arithmetic number, because the mean of its divisors is an integer number (118349214).

Almost surely, 2^1212012011 is an apocalyptic number.

1212012011 is a deficient number, since it is larger than the sum of its proper divisors (208178557).

1212012011 is a wasteful number, since it uses less digits than its factorization.

1212012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180698 (or 180691 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1212012011 is about 34813.9628741113. The cubic root of 1212012011 is about 1066.1925442474.

Adding to 1212012011 its reverse (1102102121), we get a palindrome (2314114132).

The spelling of 1212012011 in words is "one billion, two hundred twelve million, twelve thousand, eleven".