1212021232011 has 12 divisors (see below), whose sum is σ = 1750955600160. Its totient is φ = 807894955440.

The previous prime is 1212021232003. The next prime is 1212021232027. The reversal of 1212021232011 is 1102321202121.

1212021232011 is a `hidden beast` number, since 1 + 2 + 120 + 212 + 320 + 11 = 666.

It is not a de Polignac number, because 1212021232011 - 2³ = 1212021232003 is a prime.

It is a super-2 number, since 2×1212021232011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212021232031) 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, 9868851 + ... + 9990908.

It is an arithmetic number, because the mean of its divisors is an integer number (145912966680).

Almost surely, 2^{1212021232011} is an apocalyptic number.

1212021232011 is a deficient number, since it is larger than the sum of its proper divisors (538934368149).

1212021232011 is a wasteful number, since it uses less digits than its factorization.

1212021232011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19866546 (or 19866543 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212021232011 its reverse (1102321202121), we get a palindrome (2314342434132).

The spelling of 1212021232011 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred thirty-two thousand, eleven".