1212021211011 has 32 divisors (see below), whose sum is σ = 1745333567040. Its totient is φ = 743721398784.

The previous prime is 1212021210877. The next prime is 1212021211021. The reversal of 1212021211011 is 1101121202121.

It is a happy number.

It is not a de Polignac number, because 1212021211011 - 2¹⁵ = 1212021178243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212021211021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19247085 + ... + 19309953.

It is an arithmetic number, because the mean of its divisors is an integer number (54541673970).

Almost surely, 2^{1212021211011} is an apocalyptic number.

1212021211011 is a deficient number, since it is larger than the sum of its proper divisors (533312356029).

1212021211011 is a wasteful number, since it uses less digits than its factorization.

1212021211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64295.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212021211011 its reverse (1101121202121), we get a palindrome (2313142413132).

The spelling of 1212021211011 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred eleven thousand, eleven".